The British Olympic Association say that players from all home nations will be eligible for selection for Team GB at the London 2012 Games.
Welsh FA president Phil Pritchard: "We are not part of any agreement. The FA have no authority to speak on our behalf - they do not represent Wales whatsoever and that's a fact.
"We have not discussed this at any time recently."
SFA chief executive Stewart Regan: "I am very surprised and disappointed".
The three home associations have long opposed an all-British team at the London Games, fearing it could affect their separate identities in world football, and saying the team should be made up of English players only.