The ANC took the decision to recall Zuma after a marathon meeting on Monday that stretched into the early hours of Tuesday.
ANC secretary-general Ace Magashule said, on Tuesday night, that Zuma had notified the party that he wanted to hold a press conference at 10am and address the nation.
It dumped him as party leader in December, narrowly electing Ramaphosa, a millionaire former union leader, over Zuma's preferred successor, his ex-wife Nkosazana Dlamini-Zuma. The president also faces almost 800 corruption allegations stemming from an arms deal during the 1990s.
Zuma's presidency has been overshadowed by allegations of corruption which he has always vehemently denied.
The ANC has led South Africa since Nelson Mandela became the country's first black president in 1994, after the gradual end of apartheid. "We would like to create certainty.to help people [who are] guessing what we are going to do next", Mr Mthembu said after a meeting of ANC lawmakers.
If Zuma does not resign beforehand, the parliament was set to debate a motion of no confidence in him on Thursday 15 February.
One of the opposition groups, the Democratic Alliance (DA), said Zuma could simply ignore the recall notice.
3 die, others hurt in Grand Canyon helicopter crash
The aircraft came down at about 17:20 local time (00:20 GMT) on Saturday. "Officer Canyon is a to a great degree remote region". Even a former critic says Papillon has become a safer company in the past two decades.
"They further erode the house of cards that has formed around the nexus between the president, senior leaders of the ANC and the Guptas".
Besides the pressure from the ANC, Zuma is facing a no-confidence motion in parliament brought by the opposition Economic Freedom Fighters.
Its motion will be amended by the ruling African National Congress (ANC) to retain the "no confidence" elements but with a different preamble and reasoning.
In 2016, South Africa's top court ruled that Zuma had acted unconstitutionally when he used $15 million in public funds to upgrade his private home and ordered him to repay some of the money.
Shortly after dawn, a dozen officers from the elite Hawks police unit sealed off a street leading to the Gupta mansion in Johannesburg's upscale Saxonwold suburb.
"I need to be furnished on what I've done", the 75-year-old president said. The Guptas have business links to Zuma and his family and a string of witnesses say they had influence over lucrative state contracts and appointments.
Local media said this was to inform Zuma of the NEC's decision that he should leave office.