Unal has enjoyed an impressive season on-loan with FC Twente, where he's shone this campaign.
However, the youngster admits he won't be returning to City next season as he still doesn't qualify for a work permit.
A return to Turkey has been mooted, but agent Batur Altiparmak says: "We have not received any offer from Turkey for Ünal.
"He will not return to Turkey. He will continue to play in Europe."
Lazio are among clubs tracking Unal.