Neser, 33, has two ODI caps to his name which he earned on the 2018 tour of England. He will join the tour in Potchefstroom ahead of the third game.
“‘[He] is an experienced all-format cricketer who will provide us with an extra fast bowling option should that be required for the remainder of the tour,” selector Tony Dodemaide said.
ODI captain Pat Cummins is not yet available as he continues his recovery from the wrist injury sustained in the Ashes while Starc is still overcoming a groin problem although there is hope both will be available for at least some of the three-match series in India which precedes the World Cup.
Australia are juggling a number of injuries ahead of the tournament with Steven Smith (wrist) and Glenn Maxwell (ankle) also in the recovery stage, although Maxwell was always due to miss the ODIs in South Africa for the birth of his first child.
Nathan Ellis is the other specialist pace bowler currently with the squad while allrounder Aaron Hardie is also available.
Australia won the opening match of the series by three wickets with Green’s replacement, Marnus Labuschagne, playing the matchwinning hand in an unbroken eighth-wicket stand of 112 with Ashton Agar.