"He has a contract and we are very happy with him."
Valverde has led Barca to consecutive La Liga titles but failed to end the club's malaise in Europe, where they have not reached the final since 2015.
"The planning for next season has been under way for some time," Bartomeu added.
"Now it is about the players recovering from the mental shock that we suffered. But the result of the Copa final will not be decisive for anyone."
Barcelona sit 11 points clear of second-placed Atletico Madrid in the table, ahead of their final league game away at Eibar on Sunday.
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