English referee Michael Oliver stopped play in the second half at Vodafone Park until the cat left the pitch.
The ginger moggy was spotted at pitchside after 50 minutes of play and UEFA - European football's governing body - has called the club to account, announcing a charge of '"insufficient organisation (animal on the field of play)".
UEFA also announced Besiktas have been charged over the throwing of objects and blocked stairways.
The case will be heard by Uefa's disciplinary body in May.
