She was diving off Tioman island in Malaysia last Saturday in an area known for its low visibility and deep waters.
Ms Sim Qiu Yan, 30, drowned that day.
She was said to have been diving near Sipadan Wreck where a Malaysian Maritime Enforcement Agency vessel was sunk to make an artificial reef.
The Singaporean, who had reportedly gone there with eight friends and was accompanied by an instructor, was found missing at about 11.50am on Saturday.
Her body was recovered at about 10pm the same day and taken to Kuantan General Hospital, said Chinese daily Lianhe Zaobao.
Details about her death remain unclear and it is not known if she was actually diving in the wreck, but dive instructors told The New Paper that diving in wrecks in open water has its dangers.
One of the main problems is the depth of the wreckage, they said.
The Sipadan Wreck, for example, is in area that is about 30m deep and is for advanced divers.
Those with basic certification are allowed to dive only at a maximum depth of 18m, said Mr Leon Boey, who owns diving operator Living Seas.