A few days after belting 85 off 43 balls to guide the visitors to a comfortable win in the opening Chappell-Hadlee T20 game at Bay Oval, Marsh was at it again on Saturday night.
Marsh smashed an imperious century to guide his side past another mediocre Black Caps batting performance and to victory in the third and final encounter.
Chasing just 157 to complete a 2-0 series win, after the second clash was rained out, the Australians achieved their target with three wickets in hand and two overs early.
Marsh was unbeaten on 103 off 52 balls at the end.
While the captain was in command from the start, he struggled to find any support at the other end, only tail-enders Mitchell Owen (14) and Sean Abbott (13) reaching double figures, as the Black Caps almost achieved the unthinkable.
All-rounder Jimmy Neesham brought them back into the contest with the wickets of wicketkeeper Alex Carey and Marcus Stoinis in successive deliveries — his last ball of the ninth over and his first ball of the 11th, finishing with 4/26 off his four overs.
Mark Chapman starred in the field with spectacular catches to dispatch Matt Short and Carey.
Earlier, the Black Caps struggled to find any momentum in another stuttering performance with the bat.
Opener Devon Conway’s forgettable series continued with a two-ball duck to go with his solitary run in the opener, as Josh Hazlewood claimed the first of his two wickets, followed shortly after by Tim Robinson, who nicked behind for 13.
Opener Tim Seifert blasted a 35-ball 48, as both Daryl Mitchell and Chapman fell cheaply, bringing together skipper Michael Bracewell and Neesham, who combined for the highest partnership of the innings with 39.
When they both fell in the mid-20s, the writing was on the wall for the Black Caps, the tail unable to wag, as they meandered towards the underwhelming total with one wicket in hand.
Abbott inflicted further damage at the death to finish with figures of 3/25.
Third T20
The scores
Black Caps: 156/9 (Tim Seifert 48, Michael Bracewell 26, Jimmy Neesham 25, Sean Abbott 3-25, Xavier Bartlett 2-25, Josh Hazlewood 2-26).
Australia: 160/7 (Mitch Marsh 103, Neesham 4-26, Jacob Duffy 2-29).
Australia won by three wickets.
— RNZ/Allied Media
