The 2030 Agenda for Sustainable Development Goals (SDGs) presents a universal framework for peace and prosperity, yet its implementation varies dramatically across different national contexts. This paper provides a comparative quantitative analysis of the development trajectories of three diverse South Asian nations—India, Nepal, and the Maldives—from 2000 to 2023. It examines how these countries have struck a balance between pursuing economic growth (SDG 8) and making progress towards social development (SDG 3 & 4) and environmental sustainability (SDG 13). The analysis of key indicators reveals highly divergent paths. While all three nations have made strides in economic and social domains, this progress is often coupled with a significant environmental cost, particularly evident in India's rising CO2 emissions. Maldives stands out as a high-income service economy with unique climate vulnerabilities, while Nepal's trajectory highlights the challenges of a least-developed, landlocked country. Our findings underscore that there is no single model for sustainable development in South Asia; instead, achieving the SDGs requires tailored strategies that address the specific trade-offs inherent in each nation's unique economic and geographic context.