Earlier, the 55-nation African Union condemned the remarks, while Botswana and Senegal hauled in the U.S. ambassador to complain.
"We view the utterances by the current American President as highly irresponsible, reprehensible and racist", it added.
The group called the remarks "outrageous, racist and xenophobic" while thanking those Americans who had condemned the remarks.
Ambassadors unanimously agreed on the resolution after an emergency session to weigh Mr Trump's remarks.
African anger about Trump's comments, made during a White House meeting on immigration, could impact USA companies doing business in one of the world's fastest growing regions and complicate the Pentagon's counterterrorism efforts and security cooperation on the continent, diplomats and analysts said.
The president tweeted that he used "tough" language but that that was "not the language used".
"I don't think the Present Trump is a racist in the traditional sense as we know in this country", Farris Jr. said.
The explosive remarks came during a conversation about the visa lottery program, which benefits some African countries, and about the temporary protected status given to immigrants from certain nations, including El Salvador and Haiti.
The alleged remarks were said to have also been made in reference to Haiti and El Salvador. My mother and father immigrated to the United States in the '60s and they brought my sister and I here to have a better life. At the time, the doctor said Mr. Trump was 6 foot 3 and 236 pounds, which qualifies him as overweight and almost obese, according to the Centers for Disease Control.
Congressional Black Caucus Chair Cedric Richmond and House Judiciary top Democrat Jerrold Nadler said they would seek to introduce a censure resolution against Trump next week. "For him to confront the president as he did, literally sitting next to him, took extraordinary political courage and I respect him for it". The White House has faced a barrage of questions over his contradictory messages on key policies and an incident last month where he slurred some words while giving a speech. The general check-up results of former U.S. presidents have included basic information such as weight, blood pressure, heartbeat and cholesterol levels.
Trump's comments are extremely offensive to South Africa, said Jessie Duarte, a senior official with the ruling African National Congress.
Prominent Kenyan commentator Patrick Gathara told AFP that Trump's words were nothing new.
Mr Trump announced on Thursday he would not be visiting London to open the new $1bn (728.6m) embassy in Nine Elms, Battersea, in south London, next Tuesday because it was a bad deal.
He tweeted: "God made me African".
Underscoring the hurdles facing the effort, other Republicans undercut the significance of the deal the half-dozen senators hoped to sell to Trump.
It said the current United States embassy in Grosvenor Square, central London, had aged beyond its ability to be improved to current security and life safety standards without extensive investment in infrastructure that would require appropriated dollars. Trump said, people briefed on the meeting told The Washington Post. When it comes to immigration reform and securing our borders, we have urgent and serious needs to address and many critical policies to debate.