The Independent Evaluation Department (IED) of the Asian Development Bank (ADB) has validated the Mongolia country partnership strategy (CPS) final review, 2017–2020. The validation concluded that the program was successful on the borderline. It found the program was relevant, effective, less than efficient, likely sustainable, and with satisfactory development impact. The final review rated ADB’s program successful: highly relevant, effective, less than efficient, and likely sustainable, with a satisfactory development impact. The validation drew from information presented in the CPS final review; relevant project documents; analysis of available country data; and interviews with a range of stakeholders and ADB staff. Due to the outbreak of the coronavirus disease (COVID-19) pandemic, interviews with government officials and other stakeholders were conducted online, and no country visit was undertaken.