For the first two weeks of July, the Holland international can leave Inter for a set fee of €30m thanks to a clause in his current contract.
La Gazzetta dello Sport says while Inter management do not want to lose Dumfries, they will be powerless should a club meet his clause and the player agree to leave.
Dumfries was one of the few bright points in the final months of last season as Inter suffered a stunning form slide.
The Dutchman's form saw him linked with the likes of Chelsea and Barcelona as the season came to an end.
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