Corporate social responsibilities (CSR) have gained the attention of regulators and recent studies due to their comprehensive influence on the firm performance. Thus, the present study examines the impact of CSR practices such as social welfare, human rights and physical environment on SMEs performance in Vietnam. This research also investigates the mediating role of organizational support among the links of social welfare, human rights, the physical environment and SMEs performance in Vietnam. This study has followed the primary data collection methods such as survey questionnaires to collect the data from respondents and also executed the smart-PLS for analysis. The results indicated the social welfare, human rights and physical environment have a positive association with SMEs performance in Vietnam. The results also exposed that organizational support positively mediates among the links of social welfare, human rights, the physical environment and SMEs performance in Vietnam. This study guided the regulators while developing the regulations related to CSR and firm performance.