SAARC is a political and economic regional organization for south Asian countries to promote social progress, cultural development, economic growth, collective self-reliance among south Asian countries, and mutual trust and appreciation of one another's problems. Unfortunately, proposed objective has not been established yet among south Asian countries. As a result, several conflicts exist among south Asian countries, and their economic condition is not well developed. This research will illustrate Myanmar's Rohingya crisis, which can be a significant factor in creating conflict among south Asian countries in the future. In addition, this research will demonstrate how the Rohingya crisis issue impacts Bangladeshi political and economic conditions. Initially, a consequence of universal conflict and common reasons are discussed, and this study acknowledges the challenges that preventative programmes face. As a result, this study aims to determine the viability of a conflict prevention mechanism in South Asia that alleviates the anxiety of violating the principle of non-intervention to a large amount. Secondly, the cause of conflict between the Myanmar Muslim minority and Rohingya Myanmar is discussed. Then, the impact of the Rohingya crisis on Bangladesh from various perspectives is analyzed, such as political violence, linkages with international terrorist organizations, water security & climate change, Rohingya terrorist group "Harakah al Yakin", and Maritime tension in the EEZ with Myanmar. Finally, a solution is proposed regarding establishing peace among south Asian countries to avoid any external threat like the Rohingya issue. This research has practical value in the modern world to control any regional conflict and protect citizens from external threats.