The present study was designed to examine the extent to which perfectionism and social problem solving add to the prediction model of nonsuicidal self-injury (NSSI), independent of suicide risk, in a sample of 386 ethnoracially diverse college students. Moreover, the authors were interested in whether social problem solving, beyond perfectionism, would account for additional variance in their prediction model. Results indicated that social problem solving did account for significant variance in the prediction model of NSSI, above and beyond perfectionism. Moreover, on controlling for suicide risk, a possible confound for NSSI behaviors, social problem solving was found to account for an additional 4.0 percent of unique variance in the prediction of NSSI, beyond that accounted for by perfectionism. The present findings have theoretical implications for the literature on perfectionism and social problem solving, specifically in relation to NSSI. In addition, the present findings have practical implications for social workers who work with college students engaging in NSSI behaviors.