S-adenosyl-L-methionine-dependent methyltransferase that mediates N(3)-methylcytidine modification of residue 32 of the tRNA anticodon loop of tRNA(Thr)(UGU) and tRNA(Arg)(CCU). cytidine(32) in tRNA(Thr) + S-adenosyl-L-methionine = H(+) + N(3)-methylcytidine(32) in tRNA(Thr) + S-adenosyl-L-homocysteine cytidine(32) in tRNA(Arg)(CCU) + S-adenosyl-L-methionine = H(+) + N(3)-methylcytidine(32) in tRNA(Arg)(CCU) + S-adenosyl-L-homocysteine Monomer (By similarity). Interacts with DALRD3 (PubMed:32427860). Belongs to the methyltransferase superfamily. METL family.