The 22-year-old has been at Barcelona since 2011, progressing through the club's academy before establishing himself in the senior side in 2022. However, he has not convinced head coach Hansi Flick that he should be a regular starter this season, prompting uncertainty over his future.
Balde's contract runs until the summer of 2028, but a winter departure is now being considered. According to Catalan newspaper Sport, Mendes has contacted a number of clubs to explore interest in the defender.
Liverpool, Aston Villa and Manchester United have all been offered the opportunity to sign him, although none has yet made a decision. Tottenham and Manchester City are also possible destinations, but their interest would depend on other players leaving first.
There has also been contact from Italy. Juventus and Roma have met Mendes to establish what would be required to bring Balde to Serie A, but the defender's wages are understood to be a significant obstacle for both clubs.
Monaco and Benfica are also listed as potential options, giving Mendes several possible routes away from Barcelona if a move becomes possible.
Barcelona are reportedly prepared to consider a loan arrangement rather than insist on a permanent transfer. Allowing Balde to leave temporarily would also help the club reduce its wage commitments and create room to strengthen elsewhere during the January window.
A left-footed centre-back is understood to be Barcelona's leading recruitment priority, while Flick also wants a versatile full-back. Balde's possible departure could therefore form part of a wider reshaping of the defensive options rather than simply a decision to move on a player who has come through the academy.
The situation remains unresolved, with the clubs approached yet to make a firm decision and Barcelona still weighing how best to use the January market. Balde's contract has two and a half years remaining, so any departure would require agreement on the terms of a loan or transfer.