How to Stop Group Members from Sending Messages on WhatsApp Group

How to Stop Group Members from Sending Messages on WhatsApp Group:

1. Go to the WhatsApp Chats tab, slide a group chats to the left, and tap More... button. 

2. Choose the Mute menu item in the pop-up menu. 

3. Then you can mute the WhatsApp group chat to 8 hours, 1 week, and 1 year