Enrique has come under pressure of late as Barca have slipped to fourth in the La Liga standings following consecutive defeats away to Real Madrid and at home to Celta.
However, Bartomeu is confident Enrique will deliver on the high expectations at Camp Nou.
"It's not a crisis," Bartomeu told Esport3. "We are just 25 per cent of the way through the season.
"It takes patience. Success will come. This is only the beginning and the trust in Luis Enrique is total.
"There is a lot of La Liga left to play and we have a lot of talent. We have confidence in this team.
"We're not worried but rather excited about what Luis Enrique is doing."