diff --git a/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/datafactory.json b/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/datafactory.json
index e46d6181e288..8ac8e38601ed 100644
--- a/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/datafactory.json
+++ b/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/datafactory.json
@@ -3098,6 +3098,51 @@
         }
       }
     },
+    "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.DataFactory/factories/{factoryName}/triggers/{triggerName}/triggerRuns/{runId}/cancel": {
+      "post": {
+        "tags": [
+          "triggerruns"
+        ],
+        "operationId": "TriggerRuns_Cancel",
+        "x-ms-examples": {
+          "Triggers_Rerun": {
+            "$ref": "./examples/TriggerRuns_Cancel.json"
+          }
+        },
+        "description": "Cancel a single trigger instance by runId.",
+        "parameters": [
+          {
+            "$ref": "#/parameters/subscriptionId"
+          },
+          {
+            "$ref": "#/parameters/resourceGroupName"
+          },
+          {
+            "$ref": "#/parameters/factoryName"
+          },
+          {
+            "$ref": "#/parameters/triggerName"
+          },
+          {
+            "$ref": "#/parameters/runId"
+          },
+          {
+            "$ref": "#/parameters/api-version"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "TriggerRun has been cancelled."
+          },
+          "default": {
+            "description": "An error response received from the Azure Data Factory service.",
+            "schema": {
+              "$ref": "#/definitions/CloudError"
+            }
+          }
+        }
+      }
+    },
     "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.DataFactory/factories/{factoryName}/queryTriggerRuns": {
       "post": {
         "tags": [
diff --git a/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/entityTypes/Pipeline.json b/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/entityTypes/Pipeline.json
index 8403e4ac0fcb..b38bcc9d08f2 100644
--- a/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/entityTypes/Pipeline.json
+++ b/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/entityTypes/Pipeline.json
@@ -6574,7 +6574,7 @@
         },
         "reportStatusOnCallBack": {
           "type": "object",
-          "description": "When set to true, statusCode, output and error in callback request body will be consumed by activity. The activity can be marked as failed by setting statusCode >= 400 in callback request. Default is false. Type: boolean (or Expression with resultType boolean)."
+          "description": "When set to true, statusCode, output and error in callback request body will be consumed by activity. The activity can be marked as failed by setting statusCode >= 400 in callback request. Default is false. Type: boolean (or Expression with resultType boolean)."
         }
       },
       "required": [
diff --git a/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/examples/TriggerRuns_Cancel.json b/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/examples/TriggerRuns_Cancel.json
new file mode 100644
index 000000000000..b06046f294f8
--- /dev/null
+++ b/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/examples/TriggerRuns_Cancel.json
@@ -0,0 +1,21 @@
+{
+  "parameters": {
+    "subscriptionId": "12345678-1234-1234-1234-12345678abc",
+    "resourceGroupName": "exampleResourceGroup",
+    "factoryName": "exampleFactoryName",
+    "triggerName": "exampleTrigger",
+    "runId": "2f7fdb90-5df1-4b8e-ac2f-064cfa58202b",
+    "api-version": "2018-06-01"
+  },
+  "responses": {
+    "200": {
+      "headers": {
+        "Date": "Sat, 16 Jun 2018 00:46:24 GMT",
+        "X-Content-Type-Options": "nosniff",
+        "x-ms-ratelimit-remaining-subscription-writes": "1198",
+        "x-ms-request-id": "5aa854a5-7ac0-4c7e-9356-79c657f4e231",
+        "x-ms-correlation-request-id": "5aa854a5-7ac0-4c7e-9356-79c657f4e231"
+      }
+    }
+  }
+}
diff --git a/specification/synapse/data-plane/Microsoft.Synapse/preview/2019-06-01-preview/artifacts.json b/specification/synapse/data-plane/Microsoft.Synapse/preview/2019-06-01-preview/artifacts.json
index 0dfc0e51ebbd..c7b8fb876b6d 100644
--- a/specification/synapse/data-plane/Microsoft.Synapse/preview/2019-06-01-preview/artifacts.json
+++ b/specification/synapse/data-plane/Microsoft.Synapse/preview/2019-06-01-preview/artifacts.json
@@ -1157,6 +1157,42 @@
         }
       }
     },
+    "/triggers/{triggerName}/triggerRuns/{runId}/cancel": {
+      "post": {
+        "tags": [
+          "triggerruns"
+        ],
+        "operationId": "TriggerRun_CancelTriggerInstance",
+        "x-ms-examples": {
+          "Triggers_Rerun": {
+            "$ref": "./examples/TriggerRuns_Cancel.json"
+          }
+        },
+        "description": "Cancel single trigger instance by runId.",
+        "parameters": [
+          {
+            "$ref": "#/parameters/triggerName"
+          },
+          {
+            "$ref": "#/parameters/runId"
+          },
+          {
+            "$ref": "#/parameters/ApiVersionParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "TriggerRun has been cancelled."
+          },
+          "default": {
+            "description": "An error response received from the Azure Synapse service.",
+            "schema": {
+              "$ref": "#/definitions/CloudError"
+            }
+          }
+        }
+      }
+    },
     "/queryTriggerRuns": {
       "post": {
         "tags": [
diff --git a/specification/synapse/data-plane/Microsoft.Synapse/preview/2019-06-01-preview/examples/TriggerRuns_Cancel.json b/specification/synapse/data-plane/Microsoft.Synapse/preview/2019-06-01-preview/examples/TriggerRuns_Cancel.json
new file mode 100644
index 000000000000..169d70a4e4b5
--- /dev/null
+++ b/specification/synapse/data-plane/Microsoft.Synapse/preview/2019-06-01-preview/examples/TriggerRuns_Cancel.json
@@ -0,0 +1,19 @@
+{
+  "parameters": {
+    "endpoint": "exampleWorkspace.dev.azuresynapse.net",
+    "triggerName": "exampleTrigger",
+    "runId": "2f7fdb90-5df1-4b8e-ac2f-064cfa58202b",
+    "api-version": "2019-06-01-preview"
+  },
+  "responses": {
+    "200": {
+      "headers": {
+        "Date": "Sat, 16 Jun 2018 00:46:24 GMT",
+        "X-Content-Type-Options": "nosniff",
+        "x-ms-ratelimit-remaining-subscription-writes": "1198",
+        "x-ms-request-id": "5aa854a5-7ac0-4c7e-9356-79c657f4e231",
+        "x-ms-correlation-request-id": "5aa854a5-7ac0-4c7e-9356-79c657f4e231"
+      }
+    }
+  }
+}