Galatasaray have been suspended from European competition for a year for breaching financial fair play rules, Uefa has confirmed, the BBC reports.
The club will be excluded from the Champions League or Europa League if they qualify this season or next.
European football’s governing body said in January that the Turkish champions had broken regulations on the level of financial losses allowed.
The Istanbul club is currently fifth in Turkey’s Super League.
Finishing in that position would leave Galatasaray outside the qualifying places for next season’s Champions League and Europa League.
Galatasaray official Iskender Baydar said that club directors are “examining the text of the decision” and will issue a statement later.