Singapore shares retreated on Tuesday, mirroring regional losses, after US President Donald Trump threatened further tariffs and export restrictions on countries that are "unfairly targeting US tech firms."

The Straits Times Index (STI), a key benchmark for the Singapore Exchange, ranged between 4,237.42 and 4,252.91 throughout the day. It ended the session at 4,243.71, down 12.78 points or 0.3% compared to Monday's close.

In economic news, Singapore's manufacturing output increased 7.1% year-on-year in July, backed by increased outputs from majority of the clusters, according to data from EDB Singapore.

In company news, Ever Glory United shares surged over 10% at the close as it signed a placement agreement with CGS International Securities Singapore to raise around SG$17.1 million.

Frasers Property's shares were down nearly 2% after its subsidiary, Lion (Singapore), agreed to purchase 10 strata lots at 51, Yishuan Central 1, Singapore, from Frasers Centrepoint Trust.

Meanwhile, shares Hong Leong Asia were up over 4% as its NYSE-listed unit, China Yuchai International, said that its indirect subsidiary is considering a potential listing on a foreign exchange.