Australian fast bowler Stuart Clark has been left out of the New South Wales squad for the Sheffield Shield clash against Western Australia at the SCG on Thursday to nurse his injured elbow. Cricket Australia had in fact, instructed the NSW selectors to rest him for the sake of being fit for forthcoming national assignments.

"He (Clark) told me he wanted to play and wanted to play last weekend against Queensland but (national team physiotherapist) Alex Kountouris and his medical team had said no," NSW chairman of selectors Brian Taber told AAP.

The Blues made three changes to from the previous game, bringing in Nathan Bracken, Ed Cowan and Steven Smith for Peter Forrest, Grant Lambert and Moises Henriques. However, batsman David Warner was once again omitted and will have to wait longer for his first-class debut.

"We hope he will play in all forms in the not too distant future," Taber said. He explained that it he was omitted in favour of Usman Khawaja who impressed in the Blues' previous game.

Squad: Dominic Thornely (capt), Nathan Bracken, Beau Casson, Ed Cowan, Burt Cockley, Phil Jaques, Usman Khawaja, Greg Mail, Ben Rohrer, Daniel Smith, Steve Smith, Mitchell Starc.