Chief Executive Carrie Lam will make a statement at 15:00. Hong Kong time, the government said.
Democracy-oriented legislator Alvin Yeung told CNN that Lam should use the term "deferred" in relation to the bill. The pro-democracy camp to which Yeung belongs is aware that there is currently no timetable for resuming negotiations on the bill.
A senior pro-Beijing legislator confirmed to CNN that Lam would announce a delay in the negotiations bill, but said it was not postponed.
The expected announcement follows violent clashes between police and protesters on Wednesday after tens of thousands, mostly young people, had surrounded the city's government headquarters and forced lawmakers to postpone a debate on the bill.
They were only the youngest in a series of public protests against the law that left critics suspicious of being able to extradite the population to mainland China for political or unintentional business policy violations.
A civil rights spokesperson confirmed to CNN that despite the news that the bill may be paused, the march would continue. A statement from the Democratic Party said the march would start at 2:30 pm local time at Victoria Park on Sunday. The demonstrators will be dressed in black and demand that the bill be completely withdrawn and Lam step down.
Pro-democracy figures said that the pro-Beijing Lam Legislation would lead to erosion of civil rights in Hong Kong, including freedom of expression and
"We fear that we will become a mainland city," Legislator Fernando Said Cheung on Thursday. "We no longer have the rule of law, our own autonomy."
According to Director-General Carrie Lam, the bill was needed to ensure that Hong Kong would not become a refuge for refugees fleeing justice in mainland China.
Hong Kong's Legislative Council will take a summer break on July 20 before returning in October.