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Open the Messages app on your Android. Tap the group you want to leave. Tap the ⋮ button on the top-right. Tap People & options on the menu. Slide the Notifications switch to .
Find and tap the {"smallUrl":"https:\/\/www.wikihow.com\/images\/3\/3b\/Android7messages.png","bigUrl":"\/images\/thumb\/3\/3b\/Android7messages.png\/30px-Android7messages.png","smallWidth":460,"smallHeight":460,"bigWidth":"30","bigHeight":"30","licensing":"<div class=\"mw-parser-output\"><p>I edited this screenshot of an Android icon.\n<\/p><p>License: <a rel=\"nofollow\" class=\"external text\" href=\"http:\/\/en.wikipedia.org\/wiki\/Fair_use\">Fair Use<\/a><br>\n<\/p><\/div>"} icon on your Apps menu to open Messages. Find the group message thread you want to delete on the list of your recent messages, and open it. It will open a drop-down menu. This will open your message settings for the selected conversation. This will disable all message and member notifications from the selected message thread. You won't receive any push, light or sound notifications from this group anymore.