How do I keep one friend hidden from all other friends?

You can go to settings to retreat your mobile number

Check if following the instructions mentioned on the link below help to add your friend to your Facebook friends list:
https://www.facebook.com/help/360212094049906/

If you are not able to find your friend's profile on Facebook, he may have either hidden or deleted the profile. You will have to check this out with him or some common friends.

GuruAid.com

Usually friends are hidden depending on the person's Facebook you are on or the person's friend has it set to hide. Usually you can only not see friends if you are not friends with this person. It's a privacy setting. I hope this made sense.

Hoi hier met Joke mijn vrienden staan niet meer in mijn lijst waar ik mijn dingen wel vraagen wat die zijn weg ik heb alleen mijn vrienden van
facbook maar die speelen niet hidden chronicles kun uw a.d mijn helpen wand kan ik dat sleep niet meer spelen gr Joke

Facebook allows users to customize their individual news feed to filter out posts made by applications or friends that a user may not wish to view. The process of hiding friends and applications from your News Feed involves the click of a button and you can very easily hide a friend or application by accident. You can always restore a Facebook friend or application to your News Feed by following these simple steps.

1. Login to Facebook.
2. Go to your Facebook home page and make sure your News Feed is displayed (as opposed to "Live Feed").
3. Scroll down to the bottom of your News Feed and find the Edit Options menu on the right.
4. Click edit options and a box will pop up showing what you have hidden from your Facebook News Feed. Hidden posts are separated by friends and applications.
5. Find the friend or application that you wish to unhide. Once you've found it click the Add to News Feed button next to your selection. You will now once again see posts from that person or application in your news feed.

I hope you find it very helpful. Best regards.

hi this is a security issue you can verify your account by other means such as phone number or email address you will be given this option by facebook send them an email with account details they will send you a link to enable your account hope this helps you goodluck

it might be that ur phone discovery is hidden,,,,
try enabling discovery settings of ur phone bluetooth

regards

Scroll down to the bottom of your Home page, there is an "edit options", click it and it will pop up who is hidden. You can then unhide them.

Hope this helps!

At the very bottom of your Feed on the Facebook home page, you should see an "edit options" button.

Clicking this will bring up a list of all the friends you have hidden, and give you the option of un-hiding them.

This is assuming that you've hidden them from your feed, and not blocked them from viewing your profile and such. If THAT'S the case, visit this link and make the appropriate adjustments.

there are 2 ways but one is apparently not working)
( on the bottom of your homepage it says "see hidden friends" -if you click there , those friends should show up and you can add them back to the news feed)

but

hopefully this one will work - it worked for me - but then facebook is totally messed up right now...

on your home page
go to a post from a friend

hide another friend by bringing the cursor to the right until the x appears
a little window will appear with:
so and so has been hidden....
click on "show hidden friends" - then:
add to news feed
that should bring them back.

I just hid and "de-hid 2 of my friends and it worked
If it doesn't you have to wait until facebook fixes that glitch

If this does not work, then use firefox and it will work.
good luck and let me know ...