Austria faced Russia on 30th May beating them 1-0 before beating Germany 2-1 three days later. They then faced Brazil on 10th June in which they lost 3-0.
Arnautovic was spotted wearing a wrist protector against the game against Brazil but despite rumours he had fractured his wrist we were told he is fine and only a precaution.
The 29-year-old will join up with West Ham squad next week in Switzerland.
His absence is likely to cause speculation of a move to Manchester United again but we have been told they their has been no contact in the form of an enquiry or a bid for the midfielder and a new deal for Marouane Fellaini makes any future interest less likely.