This Report on Development Prospects for ASEAN Minerals Cooperation (DPAMC) is the result of research, analysis, consultation and stakeholder comment between October 2020 and August 2021. Stakeholders participating in consultations included representatives of ASEAN Member States (AMS) and the ASEAN Secretariat, mining associations in ASEAN, exploration and mining companies both operating within Member States and not currently operating in the region, ASEAN’s dialogue and development partners, civil society organisations and other non-government organisations, and research organisations. This report has informed development and finalisation of the ASEAN Minerals Cooperation Action Plan (AMCAP-III) Phase 2. A parallel report to ASEAN makes recommendations on the future design of the ASEAN Mineral Database and Information System (AMDIS).