diff --git a/Tasks/AzureResourceManagerTemplateDeploymentV3/Strings/resources.resjson/en-US/resources.resjson b/Tasks/AzureResourceManagerTemplateDeploymentV3/Strings/resources.resjson/en-US/resources.resjson
index d29f0406c0d3..bb4449642c71 100644
--- a/Tasks/AzureResourceManagerTemplateDeploymentV3/Strings/resources.resjson/en-US/resources.resjson
+++ b/Tasks/AzureResourceManagerTemplateDeploymentV3/Strings/resources.resjson/en-US/resources.resjson
@@ -81,5 +81,6 @@
   "loc.messages.LogDeploymentName": "Deployment name is %s",
   "loc.messages.ResourceGroupNameNotProvided": "Resource Group name should be provided",
   "loc.messages.LocationNotProvided": "Location is required for deployment",
-  "loc.messages.ARMServiceConnectionScope": "ARM Service Conection deployment scope - %s"
+  "loc.messages.ARMServiceConnectionScope": "ARM Service Conection deployment scope - %s",
+  "loc.messages.CompleteDeploymentModeNotSupported": "Deployment mode 'Complete' is not supported for deployment at '%s' scope"
 }
\ No newline at end of file
diff --git a/Tasks/AzureResourceManagerTemplateDeploymentV3/models/TaskParameters.ts b/Tasks/AzureResourceManagerTemplateDeploymentV3/models/TaskParameters.ts
index d0c9072c22f9..536f70070f3e 100644
--- a/Tasks/AzureResourceManagerTemplateDeploymentV3/models/TaskParameters.ts
+++ b/Tasks/AzureResourceManagerTemplateDeploymentV3/models/TaskParameters.ts
@@ -86,6 +86,11 @@ export class TaskParameters {
                 throw new Error(tl.loc("LocationNotProvided"));
             }
 
+            //Deployment mode
+            this.deploymentMode = tl.getInput("deploymentMode");
+            if(!!this.deploymentMode && this.deploymentMode === "Complete" && this.deploymentScope != "Resource Group"){
+                throw new Error(tl.loc("CompleteDeploymentModeNotSupported", this.deploymentScope));
+            }
 
             this.templateLocation = tl.getInput("templateLocation");
             if (this.templateLocation === "Linked artifact") {
@@ -98,7 +103,6 @@ export class TaskParameters {
             this.overrideParameters = tl.getInput("overrideParameters");
             this.outputVariable = tl.getInput("outputVariable");
             this.deploymentName = tl.getInput("deploymentName");
-            this.deploymentMode = tl.getInput("deploymentMode");
             this.credentials = await this.getARMCredentials(this.connectedService);
             this.deploymentOutputs = tl.getInput("deploymentOutputs");
             this.addSpnToEnvironment = tl.getBoolInput("addSpnToEnvironment", false);
diff --git a/Tasks/AzureResourceManagerTemplateDeploymentV3/task.json b/Tasks/AzureResourceManagerTemplateDeploymentV3/task.json
index f65702d96cd3..6bad16409860 100644
--- a/Tasks/AzureResourceManagerTemplateDeploymentV3/task.json
+++ b/Tasks/AzureResourceManagerTemplateDeploymentV3/task.json
@@ -15,7 +15,7 @@
     "version": {
         "Major": 3,
         "Minor": 0,
-        "Patch": 0
+        "Patch": 1
     },
     "preview": "true",
     "demands": [],
@@ -294,6 +294,7 @@
         "LogDeploymentName": "Deployment name is %s",
         "ResourceGroupNameNotProvided": "Resource Group name should be provided",
         "LocationNotProvided": "Location is required for deployment",
-        "ARMServiceConnectionScope": "ARM Service Conection deployment scope - %s"
+        "ARMServiceConnectionScope": "ARM Service Conection deployment scope - %s",
+        "CompleteDeploymentModeNotSupported": "Deployment mode 'Complete' is not supported for deployment at '%s' scope"
     }
 }
diff --git a/Tasks/AzureResourceManagerTemplateDeploymentV3/task.loc.json b/Tasks/AzureResourceManagerTemplateDeploymentV3/task.loc.json
index 393fe8fa3cee..045a89bd0462 100644
--- a/Tasks/AzureResourceManagerTemplateDeploymentV3/task.loc.json
+++ b/Tasks/AzureResourceManagerTemplateDeploymentV3/task.loc.json
@@ -15,7 +15,7 @@
   "version": {
     "Major": 3,
     "Minor": 0,
-    "Patch": 0
+    "Patch": 1
   },
   "preview": "true",
   "demands": [],
@@ -294,6 +294,7 @@
     "LogDeploymentName": "ms-resource:loc.messages.LogDeploymentName",
     "ResourceGroupNameNotProvided": "ms-resource:loc.messages.ResourceGroupNameNotProvided",
     "LocationNotProvided": "ms-resource:loc.messages.LocationNotProvided",
-    "ARMServiceConnectionScope": "ms-resource:loc.messages.ARMServiceConnectionScope"
+    "ARMServiceConnectionScope": "ms-resource:loc.messages.ARMServiceConnectionScope",
+    "CompleteDeploymentModeNotSupported": "ms-resource:loc.messages.CompleteDeploymentModeNotSupported"
   }
 }
\ No newline at end of file