TikTok attorneys cited free speech and due process rights violations during a telephone court hearing on Sunday.
Mr Trump’s restriction was initially set to start at midnight Sunday.
John Hall, an attorney for TikTok, likened the platform to a “modern day version of the town square”.
He added that banning it would go against free speech.
Judge Carl Nichols of the US District Court for the District of Columbia, placed the hold on President Trump’s decree in a last-minute decision.
TikTok released a statement welcoming Judge Nichols’ order.
A TikTok spokesman said: “We will continue defending our rights for the benefit of our community and employees.
“At the same time, we will also maintain our ongoing dialogue with the government to turn our proposal, which the President gave his preliminary approval to last weekend, into an agreement.”
This is a breaking story. More updates to follow…