This study examined the effects of locus of control, tolerance of ambiguity, vision, persistence, and resilience on entrepreneurial competency, performance, and sustainability among micro-enterprises in Kelantan, Malaysia. Adopting a cross-sectional design, the authors collected data from 403 micro-entrepreneurs. The findings revealed that locus of control and vision significantly influenced entrepreneurial competencies. In turn, entrepreneurial competencies, locus of control, and visionary traits significantly affected micro-enterprise performance. The findings also revealed a positive effect of entrepreneurial competencies and performance on micro-enterprise sustainability. The findings also confirmed a significant mediating effect of entrepreneurial competencies on the relationship between locus of control and vision and enterprise performance. The government and developmental organizations should collaborate to enhance locus of control, vision, and resilience traits in order to facilitate micro-enterprise sustainable performance.