Schalke executive Christian Heidel has said the club will not sign Holger Badstuber on a permanent basis when his loan spell from Bayern Munich comes to an end.
Former Germany international Badstuber joined the Royal Blues in January, but has made only 12 competitive appearances.
"We will not be signing him at the end of the season. The coach has discussed that with him," Heidel told a news conference ahead of the club's last home game of the season against Hamburg.
Coach Markus Weinzierl added: "I told him we already have a good left-footed player at centre-back with Matija Nastasic.
"Holger needs to play all the time -- he had many injuries throughout his career and lost a lot of time."
Badstuber, 28, suffered an anterior cruciate ligament tear in December 2012 and has struggled with injuries ever since.
However, Schalke hope to keep Chelsea loanee Baba Rahman at the Veltins Arena for another season.
The full-back suffered a cruciate ligament rupture at the African Nations Cup in January and has been out of action ever since.
Heidel said: "We are in good talks with Chelsea."