Didier Deschamps’ side are enduring their worst run of form in almost half a century, having gone 12 games without a victory in Ligue 1.
But despite the prospect of Champions League football disappearing next season, Valbuena has no intention of leaving Marseille.
“I’m still under contract,” he told RMC. “When all is well here, we can do what we want. But when all is not good, nothing happens.
“That’s what makes the charm of this club.”
Deschamps’ men will resume their search for a first league victory since January when they visit Lorient on Friday.
Valbuena has scored 20 goals in 158 appearances for the club.