There is no one definitive answer to this question, as deleting a Facebook message may depend on the specific Facebook account and message, as well as the settings of the account. However, some tips on how to delete a Facebook message before someone reads it include:- Deletting the message from the Facebook account: To delete a Facebook message, go to the account's settings and select \\"Delete this message.\\"- Deleting the message from the Facebook server: To delete a Facebook message, go to the Facebook server and delete the message.- Deleting the message from the Facebook app: To delete a Facebook message, open the Facebook app and select \\"Delete this message.\\"