After months of negotiating, Barcelona finally announced an agreement with Umtiti had been reached by issuing a statement early on Sunday evening.
The France international's extended deal ties him to the Nou Camp giants until 2023.
Umtiti is now with the France squad ahead of the World Cup and scored the opening goal in Friday's 3-1 friendly victory over Italy.
Umtiti has featured 79 times for Barcelona since arriving from Lyon in 2016. Transfer speculation soon arose, and it seemed to have an impact on the centre-back, who regressed as the campaign wore on.
Manchester United haven't been alone in pursuit of the player, with Real Madrid linked with a shock move for him as well. "We think with this clause no one will come here and try to take him away from us", Bartomeu told reporters.
After signing his contract and speaking to the media on Monday in Barcelona, he will return to France to continue his preparations for the World Cup in Russian Federation this summer. As far as Manchester United are concerned, they will now have to turn their attention elsewhere, with the player committed to Barcelona.