This publication presents the data and findings of the risk assessment on 1-(3-chlorophenyl)-2-(methylamino)propan-1-one (3-chloromethcathinone, 3-CMC), carried out by the extended Scientific Committee of the EMCDDA on 19 November 2021. On the basis of the Risk Assessment Report, on 18 March 2022, the Commission decided that 3-CMC should be included in the definition of 'drug', in the Annex to Framework Decision 2004/757/JHA.