April 25, 2017 0808 GMT
The Germany and Borussia Dortmund midfielder, 24, has been limited to nine Bundesliga starts because of muscular problems since re-signing from Bayern Munich last summer, BBC wrote.
Gotze is on a rehabilitation program and could be training by early summer, but it depends on how he responds to treatment, said the German club.
Dortmund added: "The long-term target for the player is to be fully fit and ready to play for the start of next season".
"BVB wish Mario Gotze a fast recovery, also in the name of their 10 million fans," said Borussia Dortmund's chief executive officer Hans-Joachim Watzke.
Gotze, who scored Germany's extra-time winning goal against Argentina in the 2014 World Cup final, has played 24 minutes of Bundesliga action in 2017.