diff --git a/etc/firebase-admin.remote-config.api.md b/etc/firebase-admin.remote-config.api.md
index dc48662e8c..ffbe404968 100644
--- a/etc/firebase-admin.remote-config.api.md
+++ b/etc/firebase-admin.remote-config.api.md
@@ -81,7 +81,7 @@ export interface ExplicitParameterValue {
     value: string;
 }
 
-// @public
+// @public @deprecated
 export interface FetchResponseData {
     config?: {
         [key: string]: string;
@@ -236,10 +236,11 @@ export const RemoteConfigErrorCode: {
 // @public
 export type RemoteConfigErrorCode = typeof RemoteConfigErrorCode[keyof typeof RemoteConfigErrorCode];
 
-// @public
+// @public @deprecated
 export class RemoteConfigFetchResponse {
+    // @deprecated
     constructor(app: App, serverConfig: ServerConfig, requestEtag?: string);
-    // (undocumented)
+    // @deprecated (undocumented)
     toJSON(): FetchResponseData;
 }
 
diff --git a/src/remote-config/remote-config-api.ts b/src/remote-config/remote-config-api.ts
index 0f2648d797..588bad7523 100644
--- a/src/remote-config/remote-config-api.ts
+++ b/src/remote-config/remote-config-api.ts
@@ -879,6 +879,10 @@ export interface ServerConfig {
 /**
  * JSON-serializable representation of evaluated config values. This can be consumed by 
  * Remote Config web client SDKs.
+ *
+ * @deprecated Remote Config server-side rendering (SSR) hydration of the
+ * client SDK is no longer supported. This type will be removed in the
+ * next major release.
  */
 export interface FetchResponseData {
   /**
diff --git a/src/remote-config/remote-config.ts b/src/remote-config/remote-config.ts
index 7e74fc9381..ba47866fa1 100644
--- a/src/remote-config/remote-config.ts
+++ b/src/remote-config/remote-config.ts
@@ -704,8 +704,14 @@ class VersionImpl implements Version {
 const HTTP_NOT_MODIFIED = 304;
 const HTTP_OK = 200;
 
+let fetchResponseDeprecationWarned = false;
+
 /**
  * Represents a fetch response that can be used to interact with RC's client SDK.
+ *
+ * @deprecated Remote Config server-side rendering (SSR) hydration of the
+ * client SDK is no longer supported. This class will be removed in the
+ * next major release.
  */
 export class RemoteConfigFetchResponse {
   private response: FetchResponseData;
@@ -714,8 +720,21 @@ export class RemoteConfigFetchResponse {
    * @param app - The app for this RemoteConfig service.
    * @param serverConfig - The server config for which to generate a fetch response.
    * @param requestEtag - A request eTag with which to compare the current response.
+   *
+   * @deprecated Remote Config server-side rendering (SSR) hydration of the
+   * client SDK is no longer supported. This class will be removed in the
+   * next major release.
    */
   constructor(app: App, serverConfig: ServerConfig, requestEtag?: string) {
+    if (!fetchResponseDeprecationWarned) {
+      fetchResponseDeprecationWarned = true;
+      console.warn(
+        'RemoteConfigFetchResponse is deprecated and will be removed in the next major ' +
+        'release. Remote Config server-side rendering (SSR) hydration of the client SDK ' +
+        'is no longer supported.'
+      );
+    }
+
     const config: { [key: string]: string } = {};
     for (const [param, value] of Object.entries(serverConfig.getAll())) {
       config[param] = value.asString();
@@ -740,6 +759,10 @@ export class RemoteConfigFetchResponse {
   /** 
    * @returns JSON representation of the fetch response that can be consumed
    * by the RC client SDK.
+   *
+   * @deprecated Remote Config server-side rendering (SSR) hydration of the
+   * client SDK is no longer supported. This method will be removed in the
+   * next major release.
    */
   public toJSON(): FetchResponseData {
     return this.response;
diff --git a/test/unit/remote-config/remote-config.spec.ts b/test/unit/remote-config/remote-config.spec.ts
index ffd65f79de..3d25105d35 100644
--- a/test/unit/remote-config/remote-config.spec.ts
+++ b/test/unit/remote-config/remote-config.spec.ts
@@ -1585,6 +1585,27 @@ describe('RemoteConfig', () => {
   });
 
   describe('RemoteConfigFetchResponse', () => {
+    let warnStub: sinon.SinonStub;
+
+    beforeEach(() => {
+      warnStub = sinon.stub(console, 'warn');
+    });
+
+    afterEach(() => {
+      warnStub.restore();
+    });
+
+    // This test must run before any other construction of RemoteConfigFetchResponse
+    // in this process, since the deprecation warning is emitted only once per process.
+    it('should log a deprecation warning only once', () => {
+      const templateData = deepCopy(SERVER_REMOTE_CONFIG_RESPONSE) as ServerTemplateData;
+      const template = remoteConfig.initServerTemplate({ template: templateData });
+      new RemoteConfigFetchResponse(mockApp, template.evaluate());
+      new RemoteConfigFetchResponse(mockApp, template.evaluate());
+      expect(warnStub).to.have.been.calledOnce;
+      expect(warnStub.firstCall.args[0]).to.include('RemoteConfigFetchResponse is deprecated');
+    });
+
     it('should return a 200 response when supplied with no etag', () => {
       const templateData = deepCopy(SERVER_REMOTE_CONFIG_RESPONSE) as ServerTemplateData;
       // Defines remote parameter values.