It's claimed that West Ham had set up a loan deal until the end of the season, with a permanent option worth €18million (£15million) included in the move.
However, the Hammers have allegedly learned that Wague wouldn't qualify for a work permit to play in England, so have now pulled the plug on a deal.
That leaves West Ham still looking for a new right back, and with the deadline moving ever closer, they're really in a race against time to solve a problem area.
Ryan Fredericks is injured, Pablo Zabaleta is ageing and out of contract this summer, whilst Jeremy Ngakia is a rookie and shouldn't have pressure piled on him.
Wague, 21, emerged in Belgium with KAS Eupen before earning a move to Barcelona B in 2018, having impressed for Senegal at the 2018 World Cup – even scoring against Japan.
He's now made six first-team appearances for Barca, but with Sergi Roberto and Nelson Semedo also at the club, the Catalan side were seemingly open to a loan-to-buy deal.
Wague's speed and potential would have made him a promising signing for West Ham, but that work permit issue has put paid to the Hammers' hopes of a deal – meaning they must now move on.
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