Left-hander Renshaw had played a big part in Queensland's Sheffield Shield-winning squad.
Renshaw will fly out immediately after the Sheffield Shield Final in Brisbane later on Tuesday to join up with his teammates in Johannesburg.
Smith is already suspended for the fourth Test, with more sanctions looming as Cricket Australia investigate the incident.
Mohammad Shami injured in road accident, given stitches
He will also be free to play in the Indian Premier League for his franchise the Delhi Daredevils, starting 7 April. Shami is at the centre of controversy following a series of accusations made by his wife Hasin Jahan .
Cricket Australia (CA) is expected to make an announcement about its investigation into the ball-tampering incident on Tuesday (South Africa time).
Incidentally, Renshaw was dropped ahead of the Ashes owing to his poor form and replaced by Cameron Bancroft - one of the two players, alongside Steve Smith, to be charged by the ICC after their confession to tamper the condition of the ball on Day 3 of the third Test in Cape Town.
A decision on Darren Lehmann's future as Australia coach may also be announced by CA.
The Moment Dillian Whyte Knocked Lucas Browne Spark Out
Whyte may now find himself up against Deontay Wilder next, and according to his post-fight comments, that's exactly what he wants. Dillian was regularly landing heavy and powerful shots due to Browne falling short with his own on a frequent basis.
Renshaw was replaced by Bancroft for this summer's Ashes series but has surged back into the fray with hundreds in three consecutive Shield games. The Queensland batsman played ten Test matches for Australia country and amassed 623 runs with a best of 184 runs. Matthew Renshaw's inclusion comes after Cameron Bancroft's ball-tampering attempt was caught on camera.
"I played them a year ago for my debut so I've sort of got some idea of what's coming, but I'll just try to enjoy getting back and playing for my country".
Renshaw, who is fifth on the chart of the leading run-getters in the competition, will leave for Johannesburg this evening before the fourth and final Test against South Africa begins on Friday.
Former Vice President Joe Biden Set to Speak in New Haven
According to reports, there is speculation that Biden is positioning himself to campaign for the 2020 Presidential seat. Ironically, Mr Trump also boasted about his shrewd use of social media on Twitter on Thursday morning.