Duminy will lead the side in absence of injured Faf du Plessis, who fractured his index finger in the first ODI at Durban.
Stand-in skipper Aiden Markram and senior batsman Hashim Amla have been rested for the series.
Batsman Christiaan Jonker has been included in the squad while keeper-batsman Heinrich Klaasen has also been called up to the T20 team for the first time, along with fast bowler Junior Dala.
Leg spinner Imran Tahir too has been left out, although chief selector Linda Zondi said that he has just been rested to give left arm spinners Tabraiz Shamsi and Aaron Phangiso more game time.
South Africa T20 squad: JP Duminy (capt), Farhaan Behardien, Junior Dala, AB de Villiers, Reeza Hendricks, Christiaan Jonker, Heinrich Klaasen, David Miller, Chris Morris, Dane Paterson, Aaron Phangiso, Andile Phehlukwayo, Tabraiz Shamsi, Jon-Jon Smuts.
Disclaimer: No Business Standard Journalist was involved in creation of this content
