See How to Deactivate your Facebook account.
What Happens When You Deactivate or Delete Facebook Account
The option of recovering your Facebook account is open to you if you choose to deactivate your FB account, but you should tread with caution if you choose to delete or block your Facebook account permanently because the chance of recovering or regaining any data or information from your account will not be available to you in the future: when once you delete or block your FB account, all your photos, videos, etc will be gone and you can't get it back.
Our advice to you is, if you have made up your mind, endeavor to download and back up your FB information (photos, videos, etc) because, you never can tell when you are going to need it.
Facebook has made it clear that it will take about 90 days (roughly three months) for its team to wipe off all your photos, videos, posts, likes, comments, messages, and everything else concerning your account off from their server. Other Facebook users including your friends won’t be able to visit your profile during the deletion process.
How to Backup your Facebook Information Before Deletion
Before you bury your Facebook life, you should backup your data in case you need it in the future.- Go to Settings.
- While in the General tab. Click Download a copy of your Facebook data.
- Click Start My Archive.
- Enter your Facebook account password. Click Submit.
- Click Start My Archive in the Request My Download box.
How to deactivate your Facebook account?
- Go to Settings.
- Click Security in the left pane.
- Click Deactivate your account.
How to delete your Facebook account permanently?
- Log into your Facebook account.
- Visit this link, https://www.facebook.com/help/delete_account
- Click Delete My Account.












in the top right corner of Facebook

at the top right-hand of the page

at the top right of your Facebook page.

in the top right of Facebook and select Settings




on their cover photo