Manchester United right-back Guillermo Varela has been on loan with German club Eintracht Frankfurt and was in line to play in Saturday's German Cup final against Borussia Dortmund.
However, the 24 year old defied club orders and on his right forearm got a tattoo, which has become infected.
"The club cannot tolerate that a player would defy instructions," said Eintracht sporting director Fredi Bobic. "We'd been thinking about a loan extension. But that won't happen. He'll be suspended with immediate effect."