The Ducati 350 Mark 3 is a 340 cc (21 cu in) single cylinder bevel drive SOHC motorcycle produced by the Italian manufacturer Ducati from 1968 to 1974. It was one of the first 'wide case' Ducati singles produced. A higher performance version, the Ducati 350 Mark 3D, which used desmodromic valves was also available. Total production was around 2,300 Mark 3s and 1,350 Mark 3Ds.