The 22-year-old will miss the second Test against the hosts at Trent Bridge after swearing at Ben Stokes during the first match at Lord’s last week.
It is expected that his place in the team will be taken by Chris Morris.
Bairstow writes in his column for the Daily Mail: “Kagiso Rabada is suspended but South Africa have a very good replacement in Chris Morris (pictured right).
“We won’t be expecting their bowling attack to be any less of a threat at Trent Bridge.”
In the first Test, South Africa was undone by the spin of Moeen Ali, who took 10 wickets in the match.
Bairstow, though, doesn’t believe spin will play such a crucial role in the second encounter, adding: “It will be a different challenge in the second Test and we are aware the ball might swing in Nottingham, so it’s going to be exciting.”
Of hero Ali, he says: “He’s copped a bit of stick over the last couple of years for his bowling, but he’s just become the second-fastest Englishman to the double of 2 000 Test runs and 100 wickets.
“That is some record and deserves to be recognised.
“He bowled as well as I’ve ever seen him at Lord’s and I had the perfect view of his 10 wickets from behind the stumps. You have to go back 37 years to Ian Botham in India for the last time an England player took 10 wickets and made a half-century in the same Test.”