If you want to delete a group chat, there are a few different ways to go about it. The first way is to open the group chat and click on the three lines in the top left corner of the chat window. This will open up a menu where you can select “Delete Group.” If you want to delete all of your messages in the group chat, you can click on the three lines in the top left corner of the chat window and then select “Delete All Messages.” The second way is to open your messaging app and go to your group chat. Then, click on the three lines in the top left corner of the message window and select “Delete Group Chat.” ..