To restrict someone on Facebook messenger all you have to do is open up your chats menu in the Messenger app and open the conversation with the person that you want to restrict. At the top of the conversation, click on the tab that says their name. They should open a menu and give you options of things to do with this conversation. If you scroll down near the middle of the menu, you’ll see an option that says restrict. By restricting a person on Facebook messenger, this allows them to not see when you were last active or open the conversation. it’s a lot like blocking somebody except they are unaware that you are doing this versus when you block them they know.
The second method you can use to restrict someone on Facebook messenger is to open messenger to all your chats. Next you should hover your finger over the chat in which the person you want to restrict. Lightly tap on the screen and scroll a little bit to the left and it should open a menu to give you options on what to do with that chat. This is a good way to restrict a Facebook messenger profile. When you restrict someone on Facebook messenger they can’t see when you were last active on Facebook nor can I see you when you open the chat and read their message