The midfielder missed Saturday's 2-1 win over Sunderland, and the Premier League side have insisted no surgery is needed despite claims on the contrary from Marc Wilmots
The 25-year-old missed his club's 2-1 Premier League win over Sunderland at the weekend and subsequently underwent scans on his injured wrist with Belgium head coach, Marc Wilmots, claiming the midfeilder will require surgery at some stage.
Regardless, Fellaini is set to feature in his country's crucial World Cup qualifying double-header with Croatia on Friday and Wales on Tuesday.
"Marouane Fellaini has trained with Belgium wearing a protective cast on his injured wrist," an official club statement read.
"Although some reports suggest the midfielder faces an operation and a spell on the sidelines, the deadline-day arrival is due to play in a splint against Croatia and Wales in the World Cup qualifiers."
Belgium will travel to Zagreb to face Croatia and a point will be enough to seal a first World Cup berth since 2002.