diff --git a/custom_components/irrigation_unlimited/irrigation_unlimited.py b/custom_components/irrigation_unlimited/irrigation_unlimited.py
index 7a78686..e4453ab 100644
--- a/custom_components/irrigation_unlimited/irrigation_unlimited.py
+++ b/custom_components/irrigation_unlimited/irrigation_unlimited.py
@@ -2878,6 +2878,10 @@ def update_pause(self, stime: datetime) -> bool:
             return True
         return False
 
+    def cancel(self, stime: datetime) -> None:
+        """Cancel the sequence run"""
+        self.advance(stime, -(self._end_time - stime))
+
     def update(self) -> bool:
         """Update the status of the sequence"""
 
@@ -3724,6 +3728,13 @@ def service_pause(self, data: MappingProxyType, stime: datetime) -> bool:
             if sqr.running:
                 sqr.pause(stime)
 
+    def service_cancel(self, data: MappingProxyType, stime: datetime) -> bool:
+        """Cancel the sequence"""
+        # pylint: disable=unused-argument
+        for sqr in self._run_queue:
+            if sqr.running:
+                sqr.cancel(stime)
+
 
 class IUController(IUBase):
     """Irrigation Unlimited Controller (Master) class"""
@@ -6098,7 +6109,9 @@ def service_call(
                 changed = controller.service_suspend(data1, stime)
 
         elif service == SERVICE_CANCEL:
-            if zone is not None:
+            if sequence is not None:
+                sequence.service_cancel(data1, stime)
+            elif zone is not None:
                 zone.service_cancel(data1, stime)
             else:
                 controller.service_cancel(data1, stime)
diff --git a/tests/configs/service_sequence_cancel.yaml b/tests/configs/service_sequence_cancel.yaml
new file mode 100644
index 0000000..e8077cb
--- /dev/null
+++ b/tests/configs/service_sequence_cancel.yaml
@@ -0,0 +1,143 @@
+irrigation_unlimited:
+  refresh_interval: 2000
+  controllers:
+    - name: Test Controller 1
+      preamble: "0:01:00"
+      postamble: "0:01:00"
+      zones:
+        - name: 'Zone 1'
+        - name: 'Zone 2'
+        - name: 'Zone 3'
+        - name: 'Zone 4'
+      sequences:
+        - name: "Seq 1"
+          duration: "0:05:00"
+          delay: "0:01:00"
+          repeat: 2
+          schedules:
+            - time: "06:05"
+          zones:
+            - zone_id: 1
+              repeat: 2
+            - zone_id: [2,3]
+              delay: "-0:01:00"
+            - zone_id: 4
+  testing:
+    enabled: true
+    speed: 1.0
+    output_events: false
+    show_log: false
+    autoplay: false
+    times:
+      - name: '1-Normal run'
+        start: '2023-11-28 06:00'
+        end: '2023-11-28 07:00'
+        results:
+          - {t: '2023-11-28 06:04:00', c: 1, z: 0, s: 1}
+          - {t: '2023-11-28 06:05:00', c: 1, z: 1, s: 1}
+          - {t: '2023-11-28 06:10:00', c: 1, z: 1, s: 0}
+          - {t: '2023-11-28 06:11:00', c: 1, z: 1, s: 1}
+          - {t: '2023-11-28 06:16:00', c: 1, z: 1, s: 0}
+          - {t: '2023-11-28 06:17:00', c: 1, z: 2, s: 1}
+          - {t: '2023-11-28 06:17:00', c: 1, z: 3, s: 1}
+          - {t: '2023-11-28 06:21:00', c: 1, z: 4, s: 1}
+          - {t: '2023-11-28 06:22:00', c: 1, z: 2, s: 0}
+          - {t: '2023-11-28 06:22:00', c: 1, z: 3, s: 0}
+          - {t: '2023-11-28 06:26:00', c: 1, z: 4, s: 0}
+          - {t: '2023-11-28 06:27:00', c: 1, z: 1, s: 1}
+          - {t: '2023-11-28 06:32:00', c: 1, z: 1, s: 0}
+          - {t: '2023-11-28 06:33:00', c: 1, z: 1, s: 1}
+          - {t: '2023-11-28 06:38:00', c: 1, z: 1, s: 0}
+          - {t: '2023-11-28 06:39:00', c: 1, z: 2, s: 1}
+          - {t: '2023-11-28 06:39:00', c: 1, z: 3, s: 1}
+          - {t: '2023-11-28 06:43:00', c: 1, z: 4, s: 1}
+          - {t: '2023-11-28 06:44:00', c: 1, z: 2, s: 0}
+          - {t: '2023-11-28 06:44:00', c: 1, z: 3, s: 0}
+          - {t: '2023-11-28 06:48:00', c: 1, z: 4, s: 0}
+          - {t: '2023-11-28 06:49:00', c: 1, z: 0, s: 0}
+      - name: '2-Cancel in first zone'
+        start: '2023-11-28 06:00'
+        end: '2023-11-28 07:00'
+        results:
+          - {t: '2023-11-28 06:04:00', c: 1, z: 0, s: 1}
+          - {t: '2023-11-28 06:05:00', c: 1, z: 1, s: 1}
+          - {t: '2023-11-28 06:07:00', c: 1, z: 1, s: 0}
+          - {t: '2023-11-28 06:08:00', c: 1, z: 0, s: 0}
+      - name: '3-Cancel between first and second zone'
+        start: '2023-11-28 06:00'
+        end: '2023-11-28 07:00'
+        results:
+          - {t: '2023-11-28 06:04:00', c: 1, z: 0, s: 1}
+          - {t: '2023-11-28 06:05:00', c: 1, z: 1, s: 1}
+          - {t: '2023-11-28 06:10:00', c: 1, z: 1, s: 0}
+          - {t: '2023-11-28 06:11:00', c: 1, z: 1, s: 1}
+          - {t: '2023-11-28 06:16:00', c: 1, z: 1, s: 0}
+          - {t: '2023-11-28 06:17:30', c: 1, z: 0, s: 0}
+      - name: '4-Cancel between second and third zone'
+        start: '2023-11-28 06:00'
+        end: '2023-11-28 07:00'
+        results:
+          - {t: '2023-11-28 06:04:00', c: 1, z: 0, s: 1}
+          - {t: '2023-11-28 06:05:00', c: 1, z: 1, s: 1}
+          - {t: '2023-11-28 06:10:00', c: 1, z: 1, s: 0}
+          - {t: '2023-11-28 06:11:00', c: 1, z: 1, s: 1}
+          - {t: '2023-11-28 06:16:00', c: 1, z: 1, s: 0}
+          - {t: '2023-11-28 06:17:00', c: 1, z: 2, s: 1}
+          - {t: '2023-11-28 06:17:00', c: 1, z: 3, s: 1}
+          - {t: '2023-11-28 06:21:00', c: 1, z: 4, s: 1}
+          - {t: '2023-11-28 06:21:30', c: 1, z: 2, s: 0}
+          - {t: '2023-11-28 06:21:30', c: 1, z: 3, s: 0}
+          - {t: '2023-11-28 06:21:30', c: 1, z: 4, s: 0}
+          - {t: '2023-11-28 06:22:30', c: 1, z: 0, s: 0}
+      - name: '5-Cancel last zone at overlap'
+        start: '2023-11-28 06:00'
+        end: '2023-11-28 07:00'
+        results:
+          - {t: '2023-11-28 06:04:00', c: 1, z: 0, s: 1}
+          - {t: '2023-11-28 06:05:00', c: 1, z: 1, s: 1}
+          - {t: '2023-11-28 06:10:00', c: 1, z: 1, s: 0}
+          - {t: '2023-11-28 06:11:00', c: 1, z: 1, s: 1}
+          - {t: '2023-11-28 06:16:00', c: 1, z: 1, s: 0}
+          - {t: '2023-11-28 06:17:00', c: 1, z: 2, s: 1}
+          - {t: '2023-11-28 06:17:00', c: 1, z: 3, s: 1}
+          - {t: '2023-11-28 06:21:00', c: 1, z: 4, s: 1}
+          - {t: '2023-11-28 06:22:00', c: 1, z: 2, s: 0}
+          - {t: '2023-11-28 06:22:00', c: 1, z: 3, s: 0}
+          - {t: '2023-11-28 06:26:00', c: 1, z: 4, s: 0}
+          - {t: '2023-11-28 06:27:00', c: 1, z: 1, s: 1}
+          - {t: '2023-11-28 06:32:00', c: 1, z: 1, s: 0}
+          - {t: '2023-11-28 06:33:00', c: 1, z: 1, s: 1}
+          - {t: '2023-11-28 06:38:00', c: 1, z: 1, s: 0}
+          - {t: '2023-11-28 06:39:00', c: 1, z: 2, s: 1}
+          - {t: '2023-11-28 06:39:00', c: 1, z: 3, s: 1}
+          - {t: '2023-11-28 06:43:00', c: 1, z: 4, s: 1}
+          - {t: '2023-11-28 06:43:30', c: 1, z: 2, s: 0}
+          - {t: '2023-11-28 06:43:30', c: 1, z: 3, s: 0}
+          - {t: '2023-11-28 06:43:30', c: 1, z: 4, s: 0}
+          - {t: '2023-11-28 06:44:30', c: 1, z: 0, s: 0}
+      - name: '6-Cancel last zone'
+        start: '2023-11-28 06:00'
+        end: '2023-11-28 07:00'
+        results:
+          - {t: '2023-11-28 06:04:00', c: 1, z: 0, s: 1}
+          - {t: '2023-11-28 06:05:00', c: 1, z: 1, s: 1}
+          - {t: '2023-11-28 06:10:00', c: 1, z: 1, s: 0}
+          - {t: '2023-11-28 06:11:00', c: 1, z: 1, s: 1}
+          - {t: '2023-11-28 06:16:00', c: 1, z: 1, s: 0}
+          - {t: '2023-11-28 06:17:00', c: 1, z: 2, s: 1}
+          - {t: '2023-11-28 06:17:00', c: 1, z: 3, s: 1}
+          - {t: '2023-11-28 06:21:00', c: 1, z: 4, s: 1}
+          - {t: '2023-11-28 06:22:00', c: 1, z: 2, s: 0}
+          - {t: '2023-11-28 06:22:00', c: 1, z: 3, s: 0}
+          - {t: '2023-11-28 06:26:00', c: 1, z: 4, s: 0}
+          - {t: '2023-11-28 06:27:00', c: 1, z: 1, s: 1}
+          - {t: '2023-11-28 06:32:00', c: 1, z: 1, s: 0}
+          - {t: '2023-11-28 06:33:00', c: 1, z: 1, s: 1}
+          - {t: '2023-11-28 06:38:00', c: 1, z: 1, s: 0}
+          - {t: '2023-11-28 06:39:00', c: 1, z: 2, s: 1}
+          - {t: '2023-11-28 06:39:00', c: 1, z: 3, s: 1}
+          - {t: '2023-11-28 06:43:00', c: 1, z: 4, s: 1}
+          - {t: '2023-11-28 06:44:00', c: 1, z: 2, s: 0}
+          - {t: '2023-11-28 06:44:00', c: 1, z: 3, s: 0}
+          - {t: '2023-11-28 06:46:00', c: 1, z: 4, s: 0}
+          - {t: '2023-11-28 06:47:00', c: 1, z: 0, s: 0}
diff --git a/tests/test_service_sequence_cancel.py b/tests/test_service_sequence_cancel.py
new file mode 100644
index 0000000..85475b0
--- /dev/null
+++ b/tests/test_service_sequence_cancel.py
@@ -0,0 +1,70 @@
+"""irrigation_unlimited service cancel tester"""
+import homeassistant.core as ha
+from custom_components.irrigation_unlimited.const import (
+    SERVICE_CANCEL,
+)
+from tests.iu_test_support import IUExam
+
+IUExam.quiet_mode()
+
+
+async def test_service_sequence_cancel(
+    hass: ha.HomeAssistant, skip_dependencies, skip_history
+):
+    """Test service calls to sequence"""
+    # pylint: disable=unused-argument
+
+    async with IUExam(hass, "service_sequence_cancel.yaml") as exam:
+        await exam.run_test(1)
+
+        await exam.begin_test(2)
+        await exam.run_until("2023-11-28 06:07")
+        await exam.call(
+            SERVICE_CANCEL,
+            {
+                "entity_id": "binary_sensor.irrigation_unlimited_c1_s1",
+            },
+        )
+        await exam.finish_test()
+
+        await exam.begin_test(3)
+        await exam.run_until("2023-11-28 06:16:30")
+        await exam.call(
+            SERVICE_CANCEL,
+            {
+                "entity_id": "binary_sensor.irrigation_unlimited_c1_s1",
+            },
+        )
+        await exam.finish_test()
+
+        await exam.begin_test(4)
+        await exam.run_until("2023-11-28 06:21:30")
+        await exam.call(
+            SERVICE_CANCEL,
+            {
+                "entity_id": "binary_sensor.irrigation_unlimited_c1_s1",
+            },
+        )
+        await exam.finish_test()
+
+        await exam.begin_test(5)
+        await exam.run_until("2023-11-28 06:43:30")
+        await exam.call(
+            SERVICE_CANCEL,
+            {
+                "entity_id": "binary_sensor.irrigation_unlimited_c1_s1",
+            },
+        )
+        await exam.finish_test()
+
+        await exam.begin_test(6)
+        await exam.run_until("2023-11-28 06:46:00")
+        await exam.call(
+            SERVICE_CANCEL,
+            {
+                "entity_id": "binary_sensor.irrigation_unlimited_c1_s1",
+            },
+        )
+        await exam.finish_test()
+
+        exam.check_summary()