The growth of international e-commerce has significantly influenced the development trajectory of Micro, Small, and Medium Enterprises (MSMEs) in India by enabling their participation in global markets. This study is based on secondary research data and examines the impact of international e-commerce business models on the growth, competitiveness, and sustainability of Indian MSMEs. Data has been collected from published reports, government publications, industry analysts, and academic literature to understand emerging trends and patterns. The findings indicate that international e-commerce platforms have enhanced market access for MSMEs, allowing them to reach a broader customer base beyond domestic boundaries, strengthening the competitive position of MSMEs. The study also revealed several challenges that limit the full potential of MSMEs in the global e-commerce ecosystem. These include issues related to digital literacy, inadequate infrastructure, compliance with international trade regulations, and intense competition from established global firms. Based on secondary data, smaller enterprises, particularly in rural and semi-urban areas, face greater barriers in adopting international e-commerce models. International e-commerce offered substantial opportunities for the growth and sustainability of MSMEs in India, its benefits are unevenly distributed. To address these disparities, the study emphasised that supportive policy measures, improved digital infrastructure, and capacity-building initiatives should be taken to ensure inclusive participation of MSMEs in the global digital economy.