This publication presents the data and findings of the risk assessment on 2-(methylamino)-1-(3-methylphenyl)propan-1-one (3-methylmethcathinone, 3-MMC), carried out by the extended Scientific Committee of the EMCDDA on 18 November 2021. On the basis of the Risk Assessment Report, on 18 March 2022, the Commission decided that 3-MMC should be included in the definition of 'drug', in the Annex to Framework Decision 2004/757/JHA.