Australia refusal forced Pakistan to play ODIs in UAE not in Pakistan.
South Africa were restricted to 141/9 with the returning Mohammad Amir picking up three wickets
South Africa hold nerve after Babar Azam 90 to seal series, end Pakistan world-record run of 11 straight Twenty20 series victories.
David Miller took 4 catches and effected two run outs declared man of the match.
South Africa clinched the one-day series against Pakistan on Wednesday with a comfortable seven-wicket victory in the decisive final game.
ICC Twenty20 World Cup 2020: India, Pakistan, Australia to kick off proceedings