The New South Wales Rural Fire Service (NSW RFS) confirmed two people had been killed by a fire near Glen Innes, more than 550 km (340 miles) north of Sydney.
One body was discovered in a vehicle and a woman died after being found suffering from burns on Friday.
NSW premier Gladys Berejiklian told journalists on Saturday that a further seven people were unaccounted for across the state.
“I’m sorry to say that number can increase during the day,” Berejiklian said.
This is one of Australia’s worst bushfire seasons and parts of the country are crippled by severe drought.