This chapter explores emotional intelligence (EI) as a driver of migrant entrepreneurial adaptation in changing socio-economic environments. Migrant entrepreneurs face challenges related to cultural adaptation, communication barriers, unfamiliar institutions, limited networks, and access to resources. The chapter examines how EI competencies, including self-awareness, self-regulation, motivation, empathy, and social skills, can support resilience, intercultural communication, relationship building, leadership, and business sustainability. EI is considered an adaptive resource interacting with cultural intelligence, social capital, and institutional conditions. The analysis also addresses sustainable HRM, well-being, labour market inclusion, and social integration. Selected practices from Bulgaria, Slovenia, and Bosnia and Herzegovina illustrate different approaches to migrant integration and entrepreneurship support.