This came as a major blow to South Africa, taking quite a bit of sheen off their fantastic six-wicket series-levelling win in the second Test.
The paceman denied the charge but he was found guilty and fined 50 percent of his match fee.
"It's going have to stop". Just as South Africa sensed an opening, they were stalled by 87 run stand for the fifth wicket between Khawaja and Mitchell Marsh (39 not out). CSA said Rabada would remain suspended unless a judicial commissioner was appointed early and allowed him to play pending a final decision.
Rabada was also slapped with a lesser Level One charge on Monday for his exuberant celebrations when he dismissed David Warner in the second innings on Sunday.
Rabada said he would need to avoid getting into close proximity with opponents.
"It felt like we were embarrassed in a way on our home soil (in the first test) so we just felt like it was time for us to really get up for it and turn it around", de Villiers said.
"I don't know what I'm thinking‚ actually‚" he said.
"I was very motivated to prove to people I could still play the game, even though I've been away for a while. I was just so pumped up".
It's not the first time Rabada has been forced to the sidelines, he was banned for the second Test against England in July a year ago after swearing at Ben Stokes, with the punishment pushing him to four demerit points.
"With the Stokes incident I didn't contest it because I knew I did it", he said. How he has played the game since has been a credit to the man and his teammates around him. Same thing happened in this Test match.
"I will have to see it as a big learning curve and not repeat the same mistake because I've repeated the same mistake in the eyes of the umpires". He had earned three points for making physical contact with Smith on day one (watch here), while copping one point for screaming in the face of David Warner during a send-off on the third day of the match. In the first innings, AB de Villiers hit an unbeaten 126, his 22nd Test ton.
If you're happy to call Barnes‚ a pioneering purveyor of fast off and leg breaks‚ a spinner‚ that makes Rabada potentially the greatest fast bowler in the history of the game.
The first Test had been overshadowed by the Warner-Quinton de Kock saga but all the talk in the second Test has centered around Rabada.
In the SA innings‚ Dean Elgar fell before the lunch break caught and bowled by Nathan Lyon for five.
After South Africa's seniors were shown-up in the first Test, there were concerns.
Josh Hazlewood was too good for Markram finding the edge of his bat with a swinging delivery through to Steve Smith‚ who took a smart catch at second slip. His courage leaked into Hashim Amla, who moved to 27 before an uncharacteristically loose drive at a wide delivery from Pat Cummins brought about his downfall. Steven Smith (11) started the innings positively with a six and a four in the 18 deliveries he faced before edging a delivery from Maharaj (1-70) behind the stumps and Australia headed into tea with a score of 86 for three.