/resources/local_services_lead.proto 

--- v25/resources/local_services_lead.proto 2026-10-26 16:32:22.000000000 +0000
+++ v26/resources/local_services_lead.proto 2026-10-26 16:32:27.000000000 +0000
@@ -102,6 +102,14 @@

   // Output only. True if the advertiser submitted feedback for the lead.
   bool lead_feedback_submitted = 13 [(google.api.field_behavior) = OUTPUT_ONLY];
+
+  // Output only. Campaign associated with the lead.
+  optional string campaign = 14 [
+    (google.api.field_behavior) = OUTPUT_ONLY,
+    (google.api.resource_reference) = {
+      type: "googleads.googleapis.com/Campaign"
+    }
+  ];
 }

 // Fields containing consumer contact details.