India easily won the first two games in the five-match series, and found little resistance from the Zimbabwean batsmen after they won the toss and elected to bowl first at Harare Sports Club.
Sean Williams' 45 was the highest score in a tame batting display by Zimbabwe, who lost both of their openers in the first seven deliveries of the innings and were bowled out in 46 overs.
Although Hamilton Masakadza and Brendan Taylor put on 65 for the third wicket, there were no other partnerships to speak of as the Zimbabweans put in another tame showing.
Taylor was out for 23 when he chipped Jaydev Unadkat to mid-off, while Amit Mishra picked up Masakadza, who made 38, and Malcolm Waller with successive deliveries.
Williams did his best to revive the innings with a fluid 53-ball knock, but then ran himself out as he attempted an unlikely second run.
Zimbabwe's final total was boosted by a wag of the tail as Tendai Chatara made 23 and Brian Vitori scored 17, before Amit Mishra dismissed both players to finish with figures of 4 for 47.