Bangladesh fail to seize advantage after reducing Scotland to 53 for 6 in the first innings.
South Africa host Netherlands, India, and Bangladesh in 2021-2022 season.
New Zealand won the final T20I against Bangladesh by a convincing 27 runs in Dhaka on Friday, even as the hosts took the series 3-2.
Fresh and familiar faces alike in Bangladesh T20 World Cup squad
Bangladesh hold nerves to seal their first-ever T20I series victory against New Zealand.
The series now stands at 2-1 in favour of the hosts with two matches left to go.