We describe simple Lie-type groups of rank l ~_ 3 over a finite field of odd characteristic, generated by three involutions of which two are commuting. Previously, the answers to the similar questior#s were given for alternating groups, for Lie-type groups over a finite field of characteristic 2, and for Lie-type groups of rank l >_ 4 over a finite field of odd characteristic. These furnish a description of finite simple non-Abelian groups, distinct from 26 sporadic groups, generated by three involutions two of which are commuting, thus giving a partial answer to question 7.30