Friends playlists on my music

[Lahtela]

When my friend is removing her spotify premium account, will all the playlists she has sheared with me go away from my music?

[JCdotnl]

Yes, when a user leaves, their costum made playlists are deleting too. 
Unless you copy the playlist to your own costum made playlist 

[Peter__]

I would make a copy of the playlists just to be sure, but as far as I am aware Spotify playlists are not removed when an account is deleted.