The Bosnian, who has had questions raised over his future at the Etihad Stadium due to his failure to keep a starting place in the team, is believed to have sparked interest from Borussia Dortmund.
"I love the Bundesliga and I will return to the Bundesliga," Dzeko told German sports magazine Kicker. "I can just not say when I will return. I have still two years [on my] contract. We will see, what happens."
Dzeko moved to the North-West Premier League club from Wolfsburg in 2011.