The New South Wales court of Criminal Appeal upheld Manisha Patel's appeal against the conviction and ordered a retrial, Sydney Morning Herald reported.
The then 32-year-old Patelwas found guilty by a jury in July 2015 for allegedly killing 28-year-old Purvi Joshi in 2013 in Sydney.
She was sentenced to amaximum term of 24 years in jail, with a non-parole period of 18 years.
Patel appeared in court via video-link from Silverwater Women's Correctional Centre.