During 2011 ICC Cricket World Cup, Duminy became the second batsman after Adam Gilchrist to be dismissed for 99 in a World Cup match. During 2015 ICC Cricket World Cup, Duminy became the first South African to take a hat-trick in a World Cup match. He dismissed Angelo Mathews with the last ball of an over, then dismissed Nuwan Kulasekara and Tharindu Kaushal with the first two balls of his next over. In that World Cup he along with David Miller set the record for the highest fifth wicket partnership in ODI history, the pair scoring 256 runs in an unbeaten partnership.