Former South Africa captain Faf du Plessis still has a "big role" to play for the Proteas, according to his replacement Quinton de Kock.
Keshav Maharaj is back in the ODI fold for South Africa, but Faf du Plessis will sit out again against Australia.
Despite quitting as captain on Monday, Faf du Plessis returns to the South Africa squad for the upcoming T20 series with Australia.
After a period of reflection, Faf du Plessis has stepped down as South Africa captain in all formats.
South Africa will hope that Quinton de Kock can prove himself to be a man of many talents as he takes on the captaincy of the ODI side.
Vernon Philander's international career ended in disappointment against England, which was a source of frustration for Faf du Plessis.
While speculation continues over his future as South Africa captain, Faf du Plessis insists his full focus is on the fourth Test.
Batsman Temba Bavuma was dropped from the South Africa squad after the second Test, but he comes in for Zubayr Hamza in Johannesburg.
Graeme Smith wants to understand how Faf du Plessis sees his future amid doubts over how long he plans to keep playing for South Africa.
Quinton de Kock was seemingly appointed Proteas ODI captain on a permanent basis on Tuesday, but Linda Zondi said he is only standing in.