Cheatle has been in camp with the Southern Stars throughout the Women's Ashes campaign.
Cricket Australia Team Physiotherapist, Kate Mahony said:
"Lauren has sustained a bone stress injury to her back and will be unavailable for the remainder of this year."
"The injury will be reassessed in the new year and we hope to have more information regarding her ability to return to the game at that stage," said Mahony.
The Sydney Sixers are hopeful Cheatle will return to full fitness in time to play some part for the Sixers in WBBL|03.