For all you who attempted to incorporated Facebook contacts and are now believing that it was a mistake, here's how you can get rid of Facebook Contacts from turning up on your iPhone/iPad contacts lists.
Delete Facebook Contacts From Iphone
Maybe you've set up your Facebook account in iOS, while not understanding that a contact sync would populate your address book with lots of entries that might be unfavorable. Thankfully, this choice is totally reversible.
Go to your "Settings" app and choose the "Facebook" entry, then disable the toggle labeled "Contacts". This will eliminate all Facebook contacts from your in your area saved address book. The contacts/friends themselves will remain active on Facebook, so don't worry.
If you open the "Contacts app" on your iPhone, you must see that of the entries previously noted in the "All Facebook" group are totally gone now.
How to hide Facebook contacts on iPhone.
If you want to keep the extra contacts that are synced from your Facebook account to your iPhone's address book (" Contacts" app), but hide them from the primary contact list, you can do so by adjusting your view settings.
Open up the "Contacts" app and tap "Groups" at the top left of the screen. Then scroll down to "All Facebook" at the really bottom and uncheck the product on the list. You can check any other group to make it visible, such as your iCloud contacts or other groups you might have made it possible for on your iPhone. Tap "Done" when all set.
The "Contacts" app will now hide the Facebook contacts in the main list view. Your other contacts ought to still be noticeable.
Tip: You can manage contact groups directly on your iPhone. Read More Delete Facebook Contacts From Iphone.