Prospects for Transitioning from a Linear to Circular Economy in Developing Asia brings together submissions from a call for policy papers conducted by the Asian Development Bank Institute and the Finnish Innovation Fund Sitra in early 2021. The report provides an introduction to circular economy and guidance for policy makers to better understand circular economy concepts, opportunities, and challenges, along with recommendations for policies to drive sustainable growth while significantly reducing material extraction and waste. It opens with an overview of regional policies and progress toward a circular economy in developing Asia. Next, authors investigate the regulatory and legal frameworks for promoting the circularity of plastics, a sector that relies heavily on the extraction of raw materials and contributes significantly to mismanaged waste and pollution. Finally, the report explores country examples of business cases and innovations for a circular economy. While these discussions cover many crucial circular economy topics, they provide only a snapshot of the potential. Further investigation is needed to better understand the different sectors, financing schemes, and other aspects of the transition to circularity.