Negative communication between partners can impede the enactment of prosocial, relationship maintenance behaviors. These processes are especially critical to consider for Latine young adults who hold cultural values, like familism, which emphasize the great importance of personal relationships. Using a sample of 475 Latine young adults ( M = 24.8 years, SD = 3.22), we examined the moderating role of familism on the association between negative communication (e.g., partners’ propensity to withdraw or criticize during interactions) and relationship maintenance (e.g., affectionate and supportive efforts to sustain the relationship). We found that negative communication was inversely associated with individuals’ own relationship maintenance enactment. However, familism buffered the association between negative communication and relationship maintenance; under conditions of high familism, the association between negative communication and relationship maintenance remained negative, but with a weaker effect than under conditions of low familism. Findings reinforce the negative effects of maladaptive communication in relationships more broadly and highlight the protective role of relationally oriented cultural values.