The Reds' flop, who is on loan at the Turkish club, is being dropped by the team for excessive partying.
Besiktas are not happy with the lifestyle chosen by Karius and his girlfriend Sophia Thomalla.
He is often seen at nights out, even when there are games coming up.
Besiktas believe it is impacting his performance, per Fotospor in Turkey.
It is likely he will spend some time on the bench, and may struggle to earn a permanent move there in the summer.
Karius has conceded 11 goals since the turn of the year.