Matt Henry and Lockie Ferguson helped bowl Sri Lanka out for 136.
New Zealand's pace attack made good use of a lively Sophia Gardens surface to bowl out Sri Lanka for 136 in 29.2 overs.
Ish Sodhi and Tom Blundell were the fresh picks in the Black Caps' 15-man squad for England.
Henry replaced spinner Astle, while Mustafizur and Taijul coming in for Hasan and Ahmed.
Tamim Iqbal has urged Bangladesh’s top-order batsmen to play patiently and not lose wickets in the opening 10 overs.
Ferguson is relishing the new role of a bowling finisher following his exploits in the two ODIs against Bangladesh.
Talking about the World Cup, the 27-year-old conceded that is the goal for everybody, but his focus solely remains on the Bangladesh series.
Guptill, who had tweaked his back earlier during the India ODI series, was not too happy to be off the radar.
Pandya smashed 45 from 22 balls in a dramatic late-overs passage in Wellington.
New Zealand made four changes; India rested Shami and Dhoni remained sidelined.