According to reports, the 42-year-old Trump Jr was diagnosed earlier in the week - as the virus struck DC Republicans including Sen.
"He's been completely asymptomatic so far and is following all medically recommended Covid-19 guidelines", China's Xinhua news agency quoting the spokesperson as saying.
Donald Trump Jr.'s girlfriend, Kimberly Guilfoyle, tested positive for the coronavirus this summer.
The US President spent three days in-patient at the Walter Reed military hospital where he was treated with a cocktail of experimental drugs while Melania Trump stayed at the White House and recovered. The President's son is also following the proper COVID-19 protocols and will be resting at home until a negative test is passed.
A number of other top officials in the Trump administration have caught the virus in recent months. Others who were at the party also tested positive, including White House political director Brian Jack, former White House aide Healy Baumgardner and Trump campaign advisers David Bossie and Corey Lewandowski.
As it stands, Trump Jr.is now at home in quarantine and is asymptomatic.