Jean Tigana will allow winger Eddie Lewis to join up with his American teammates for their pre-World Cup training camp after the Blackburn match.
The Americans have matches against Uruguay on Sunday in Washington, Jamaica in New Jersey on Thursday 16th May and Holland in Massachusetts on Sunday 19th May.
Tigana's decision not to release Lewis until the season had finished incensed US national coach Bruce Arena. But Tigana was insistent that Fulham's needs were met first.
Fulham spokeswoman Sarah Brookes said: "We're very disappointed with what has been said. It really doesn't help the situation or the player.
'The fact is that we have suspensions and injuries for this weekend's game and Jean wants a full squad. He wants to include Eddie and we're quite happy for him to leave the next day."