The 22-year-old will join NSW teammates Sean Abbott, Doug Bollinger, Pat Cummins and Shane Watson in the Australian team for the three-match series, beginning in Adelaide on November 5.

Maddinson made his international Twenty20 debut against India in October last year and is excited by the prospect of representing his country on home soil for the first time.

"It was very much a surprise, but with the test guys being away, it has opened up the door," he said.

"I was very shocked when I found out, but if I'm given the opportunity in any of those three games, I will grab it with both hands."

Maddinson made 34 on debut in Rajkot last year, where he got to see firsthand what it is like playing at international level.

"It all happened pretty quickly, but it was pretty exciting," he said.

"Any opportunity you get to play for your country is huge, but it will be pretty special to play in a home series for the first time," he said.

It has been a big year for Maddinson, who was a part of the NSW team who won the Sheffield Shield earlier this year and he had his first taste of the Indian Premier League with Royal Challengers Bangalore.

"I had a few weeks in Dubai for the IPL before I got injured and hopefully they want me back next year," he said.

Maddinson is hoping a bit more consistency with the bat will help him be considered for the test team in the future.

Maddinson said he is not sure what sort of team South Africa will bring to Australia, but is expecting them to be tough.

The T20 squad will assemble in Adelaide on November 1, ahead of the first international on November 5.

Game two is at the MCG on Friday, November 7, while Maddinson is hoping he will get to play in front of his home crowd at ANZ Stadium in Sydney for game three on November 9.