He was India captain Rohit Sharma's opening partner in the home T20 series against Afghanistan earlier this year but his place looked under threat as he struggled for runs in the IPL
Umtiti is the second Barca player to give a positive test for COVID-19 in the last week after his fellow French defender Jean-Clair Todibo was diagnosed with the virus on Wednesday when reporting back for pre-season training.
Barca said in a statement that World Cup winner Umtiti was asymptomatic, in good health and was currently isolating in his home, adding that people who had recently been in close contact with him would also receive a test.
The Catalans face Bayern on Friday in the Champions League 'Final Eight' tournament in Lisbon looking to book a place in the last four.