Heinrich Klaasen will be leading Proteas' T20 squad in the three-match series against Pakistan in Lahore from February 11-14, 2021
Glenton Stuurman and Migael Pretorius miss out through injury, as does Raynard van Tonder.
Elgar, Ngidi and Nortje starred for the hosts as they sealed the second Test inside three days.
Dean Elgar hit his 13th century before Sri Lanka fought back on day two of the second Test against South Africa at the Wanderers on Monday.
Anrich Nortje six blows Sri Lanka away before Dean Elgar 92 cements strangle hold.
Sri Lanka made only 180 to lose by an innings and 45 runs.