Environmental marketing has increasingly become a key strategy for fostering sustainable economic growth and promoting regional development. In Armenia and the Eurasian Economic Union (EAEU), the integration of environmental marketing into business practices requires careful financial management and strategic investment planning. This paper examines the role of environmental marketing in promoting regional development, emphasizing the importance of aligning sustainability initiatives with financial governance. The study identifies challenges such as limited access to green financing, fiscal constraints, and regulatory differences, while proposing solutions that integrate environmental marketing, risk management, and regional cooperation to enhance sustainable development.