The 22-year-old player has joined Eupen on a one-year loan from Russian club Rostov with an option to buy.
Ezatolahi is the fifth Iranian player in Belgian Fist Division League.
Ali Gholizadeh, Kaveh Rezaei, Milad Mohammadi and Younes Delfi are playing in Belgian teams.
Konigliche Allgemeine Sportvereinigung Eupen (often simply known as Eupen) is a Belgian association football club based in the city of Eupen in the German-speaking Community of Belgium, in the province of Liege.
It currently competes in the Belgian First Division A, and plays its home matches at the Kehrwegstadion.