"I am currently suffering from a knee injury. Fortunately it is not too serious but I will have to miss the two games with Belgium," Fellaini told the club's official website.
"I am hoping to be back playing for Everton as soon as possible. I am extremely disappointed and I now have to rest in order to get back to full fitness so I can help the team with some important games coming up."
Reports emerged recently claiming that the playmaker could be sidelined for up to three weeks.