INTERNATIONAL NEWS - At a New York City news conference, the trio accused Mr Trump of groping, fondling, forcibly kissing, humiliating or harassing them.
Three of them - Jessica Leeds, Samantha Holvey, and Rachel Crooks - detailed their allegations shortly beforehand live on television.
The White House said the women were making "false claims".
Trump obscene remarks were real - TV host
Monday morning's press conference was organised by Brave New Films, which last month released a documentary, 16 Women and Donald Trump, about the claims made by multiple women.
Ms Leeds, Ms Holvey and Ms Crooks originally went public separately with their allegations a month before last year's US presidential election.
The claims have been given a new lease of life by the harassment scandals that have engulfed high-profile public figures since October's fall of Hollywood producer Harvey Weinstein.
On NBC News on Monday, Ms Holvey said Mr Trump had ogled her and other competitors in 2006 at the Miss USA beauty pageant, which he owned.
The former Miss North Carolina, who was 20-years-old at the time, said "he lined all of us up" and was "just looking me over like I was just a piece of meat".
"It left me feeling very gross," Ms Holvey told NBC host Megyn Kelly.
She later told the reporters: "They've investigated other Congress members, so I think it only stands fair that he [Mr Trump] is investigated as well
