The mudslide hit part of a village in Suichuan County in Jiangxi province early on Saturday, prompting rescuers to rush to the scene and relocate residents to safer ground to prevent further danger, authorities said in a statement.
One person pulled out was found dead, while two others were rescued alive and in good condition, it said.
Rescuers on Sunday morning found one of the missing people, who was dead among collapsed houses, state broadcaster CCTV reported.
CCTV separately reported that two people were killed in Hunan province in south-central China following downpour brought by the typhoon. The report did not specify what caused the death but said the rain triggered landslides and other disasters.
Saudel made two landfalls in Zhejiang Province on August 28 and made a third landfall as a tropical storm in Fujian Province on Thursday, Chinese official news agency Xinhua reported.
In Fujian, local authorities said on Friday that multiple residents were left unaccounted for after days of heavy rain, Xinhua reported.
The exact number is unclear, but more than 100 houses collapsed in Huating Town in Putian city, it said. A dike was breached on Thursday afternoon, flooding villages and trapping residents, it added.
About 600,000 residents have been evacuated from risky offshore and onshore areas in Fujian as of Friday night, Xinhua reported.
Images from state broadcaster CCTV showed that some streets were turned into rivers, while rescuers deployed inflatable boats in their efforts.
17°C