The decision has been described as precautionary, but it adds to the growing list of injury concerns for head coach Hansi Flick.
Torres was forced to withdraw early from international duty with Spain earlier this week after experiencing discomfort in his left hamstring. Both the club and the Spanish Football Federation clarified at the time that the issue was a muscular overload without any associated structural damage.
Despite hopes that the 25-year-old would recover in time, lingering discomfort has persisted, ruling him out of Saturday's Catalan derby at the Estadi Olimpic Lluis Companys.
"First team player Ferran Torres will miss tomorrow's match against Girona as a precaution, due to discomfort stemming from the hamstring overload in his left leg, sustained during the international break," read the statement from the club.
Torres now joins an expanding injury list at Barca, which already includes Raphinha, Gavi, Dani Olmo, Robert Lewandowski, Joan Garcia, and goalkeeper Marc-Andre ter Stegen. Fermin Lopez and Lamine Yamal remain doubtful for the match, although there is hope they could play some part.
Barcelona have received a major boost ahead of their return to La Liga action, with Marc Casado cleared of a suspected adductor injury and expected to feature against Athletic Club on 22 November.
Hansi Flick oversaw a crucial 4-2 victory for FC Barcelona away at Celta Vigo, lifting his side to within three points of league leaders Real Madrid after a blistering performance spearheaded by Robert Lewandowski.
Pep Guardiola celebrated his 1000th match as a manager in fitting fashion on Sunday, guiding Manchester City to a commanding 3-0 win over Liverpool at a rain-soaked Etihad Stadium.
La Liga served up a gripping weekend of twists on Sunday, as Robert Lewandowski's hat-trick inspired Barcelona to a 4-2 victory over Celta Vigo, cutting Real Madrid's lead at the top to just three points after their stalemate at Rayo Vallecano.
