Nowadays, brain drain is a significant concern for every household in developing countries like Nepal, as students often relocate to developed nations for academic purposes. In this terms, the research's goals were the next: to determine the causes of the brain drain among Nepalese students, to investigate how the brain drain of Nepalese students is impacted by globalisation. Both primary and secondary sources of data were utilised in this mixed-methods study. Descriptive and analytical research methodologies were applied in the study. In the globalised world, the brain drain has had more detrimental than beneficial effects on developing nations like Nepal. One of the main issues that globalisation has brought about for Nepal is the brain drain. This research underscored the imperative for the Nepalese government, development partners, and national development planners to acknowledge and address the issue of brain drain. It highlighted the necessity for sustainable development initiatives and targeted campaigns designed to improve local educational and professional facilities, thereby retaining Nepalese students and mitigating the adverse impacts of the brain drain. In an effort to further their education in developed nations and gain valuable experiences and practical skills that will help them in the globalised job market, an increasing number of students are leaving their home country to pursue higher education there. This paper aimed to investigate the effects of globalisation and the factors contributing to the brain drain in Nepal. Data was gathered through in-depth interviews with preparatory students for the International English Language Testing System (IELTS), which used open-ended questions. The social, political, economic, and institutional elements that were essential for fostering the brain circulation or brain linkage sustainable development plan policies and putting into practice a campaign to materialise the idea of a "prosperous Nepal-happy Nepali" in a globalised society were also highlighted and identified in this paper.