Add disable third party to Readme

README.md

@@ -36,6 +36,7 @@ Read this in other languages: [English][en-readme], [中文][zh-readme], [日本
    * [Offline mode](#offline-mode)
    * [Event buffering](#event-buffering)
    * [GDPR right to be forgotten](#gdpr-forget-me)
+   * [Disable third-party sharing](#disable-third-party-sharing)
    * [SDK signature](#sdk-signature)
    * [Background tracking](#background-tracking)
    * [Device IDs](#device-ids)
@@ -611,6 +612,16 @@ In accordance with article 17 of the EU's General Data Protection Regulation (GD
 
 Upon receiving this information, Adjust will erase the user's data and the Adjust SDK will stop tracking the user. No requests from this device will be sent to Adjust in the future.
 
+### <a id="disable-third-party-sharing"></a>Disable third-party sharing
+
+In accordance with EU's General Data Protection Regulation (GDPR), you can notify Adjust when a user has exercised their right to disable sharing of their data to any third-party. Calling the following method will instruct the Adjust SDK to communicate the user's choice to disable third-party sharing to the Adjust backend:
+
+```objc
+[Adjust disableThirdPartySharing];
+```
+
+Upon receiving this information, Adjust will block the sharing of user's data to the partners and the Adjust SDK will continue to work as usual.
+
 ### <a id="sdk-signature"></a> SDK signature
 
 The Adjust SDK signature is enabled on a client-by-client basis. If you are interested in using this feature, please contact your account manager.