Yedlin has been linked to Tottenham this week, with reports suggesting the Premier League side were close to signing the 21-year-old defender.
Talk of an imminent switch went into overdrive on Friday after the United States international was a noticeable absentee from Seattle's training session.
And Sounders general manager Adrian Hanauer said the in-demand full-back was meeting with a team abroad, though he is expected to be back in time for Sunday's clash against Houston Dynamo.
"He's visiting with a big club in Europe," Hanauer said following reports Yedlin arrived in London on Thursday to undergo a medical.
"Obviously we're not going to give out a lot of detail but we're working toward a potential transaction."
Hanauer also revealed the Sounders were negotiating a deal that would ensure Yedlin remains at CenturyLink Field for the remainder of the MLS season.
"This wouldn't be a deal where he would be transferred and immediately loaned back," he said.
"It would be a deal that would be constructed in a way that he could potentially be here through the year and potentially longer."
Get the best features, fun and footballing frolics straight to your inbox every week.
Thank you for signing up to Four Four Two. You will receive a verification email shortly.
There was a problem. Please refresh the page and try again.