Smith was expected to turn out for Sydney Sixers in the BBL 10.
Labuschagne and Starc came one-on-one in the ongoing Sheffield Shield tournament.
De Villiers had played six matches for Brisbane Heat in the previous edition of BBL.
Essex captain Tom Westley issues apology after dousing his Muslim teammate with beer
Ashoke Dinda set to play for Goa in the 2020-21 domestic season
Cricket South Africa announces postponement Mzansi Super League 2020-21
Cricket Australia announces the fixtures for Sheffield Shield
Ben Cutting leaves Brisbane Heat after 9 years; signs new BBL deal with Sydney Thunder
WATCH: Hampshire’s Shaheen Afridi claims 4 wickets in 4 balls to stun Middlesex
Babar Azam responds with a hundred in T20 blast after being roasted by Gloucestershire
Pak PM Imran Khan rejects plea to reinstate department cricket; defends changes in domestic structure
David Willey tests positive for COVID-19; set to miss the rest of T20 blast competition
Pakistan's Rana Naved-Ul-Hasan claims he was racially abused by Yorkshire fans