diff --git a/CHANGELOG.md b/CHANGELOG.md
index 941179d3dc9..0b931c8eb79 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,2 +1,3 @@
 - Added extensions replacement registry and scraper tool to track migrations for deprecated extensions ahead of the March 2027 decommission date.
 - [Added] Loads existing `.env` files and passes environment variables to functions discovery in `runtimeDelegate`.
+- Adds --immediate flag to ext:uninstall (#10921)
diff --git a/src/commands/ext-uninstall.ts b/src/commands/ext-uninstall.ts
index bc2f2959c50..c47adb7b88b 100644
--- a/src/commands/ext-uninstall.ts
+++ b/src/commands/ext-uninstall.ts
@@ -6,25 +6,69 @@ import {
   logPrefix,
 } from "../extensions/extensionsHelper";
 import { requirePermissions } from "../requirePermissions";
-import { logLabeledWarning } from "../utils";
+import { logLabeledBullet, logLabeledWarning, logLabeledSuccess } from "../utils";
 import * as manifest from "../extensions/manifest";
+import { deleteInstance } from "../extensions/extensionsApi";
 import { Options } from "../options";
+import { needProjectId } from "../projectUtils";
+import { confirm } from "../prompt";
+import { FirebaseError } from "../error";
 
 export const command = new Command("ext:uninstall <extensionInstanceId>")
   .description("uninstall an extension that is installed in your Firebase project by instance ID")
   .option("--local", "deprecated")
+  .option(
+    "--immediate",
+    "immediately destroy GCP resources instead of waiting on next deploy. Can be run outside a firebase project directory.",
+  )
   .withForce()
   .before(requirePermissions, ["firebaseextensions.instances.delete"])
   .before(ensureExtensionsApiEnabled)
   .before(checkMinRequiredVersion, "extMinVersion")
   .before(diagnoseAndFixProject)
-  .action((instanceId: string, options: Options) => {
+  .action(async (instanceId: string, options: Options) => {
     if (options.local) {
       logLabeledWarning(
         logPrefix,
         "As of firebase-tools@11.0.0, the `--local` flag is no longer required, as it is the default behavior.",
       );
     }
+    if (options.immediate) {
+      const projectId = needProjectId(options);
+      let config;
+      try {
+        config = manifest.loadConfig(options);
+      } catch {
+        logLabeledBullet(
+          logPrefix,
+          "No firebase.json found. Proceeding to immediate extension instance teardown.",
+        );
+      }
+      if (config && manifest.instanceExists(instanceId, config)) {
+        manifest.removeFromManifest(instanceId, config);
+      }
+
+      if (
+        !(await confirm({
+          message: `About to delete Extensions instance ${projectId}/${instanceId}, its associated resources, and service account. Continue?`,
+          nonInteractive: options.nonInteractive,
+          force: options.force,
+          default: true,
+        }))
+      ) {
+        return;
+      }
+      try {
+        await deleteInstance(projectId, instanceId);
+      } catch (err: unknown) {
+        throw new FirebaseError(
+          `Error when attempting deletion: ${err instanceof Error ? err.message : String(err)}`,
+          { original: err instanceof Error ? err : undefined },
+        );
+      }
+      logLabeledSuccess(logPrefix, `Deleted Extensions instance ${projectId}/${instanceId}.`);
+      return;
+    }
     const config = manifest.loadConfig(options);
     manifest.removeFromManifest(instanceId, config);
   });