Modern technology has made it impossible to run a sustainably oriented business, particularly for small-to-medium enterprises (SMEs). The study examines the mediating role of eco-innovation (ECI) and green supply chain management (GSCM) in the food industry context in a developing country to inspect the nexus between corporate social responsibility ̣(CSR), circular economy practices (CEP) and sustainable corporate performance for SMEs. Smart PLS (version 4.0) structural method modeling (SEM) and quantitative methods were used to analyze 408 respondents collected from mid- to high-level managers in Vietnamese companies that work in the food industry. Results show that GSCM and ECI affect the sustainability of corporate performance. Furthermore, the research suggests that organizations and governments could promote ECI and GSCM in order to enhance CEP-SCP and CSR-SCP relationships. The study proposes some interesting implications that could assist high-level managers in an organization to attain sustainable performance. This study is significant because it highlights how CEP and CSR in GSCM and ECI might contribute to sustainability. Consequently, it encourages SMEs to implement operational and strategic reforms that have a major positive influence on the environment, society, and economy.