"I am filled with gratitude for the outpouring of support we have received from all across our great country, but the time has now come to suspend my campaign," Haley said in a speech.
Haley also said that she wishes Trump well, adding that he will likely win the Republican Party presidential nomination.
Americans from more than a dozen states had the opportunity to vote in Republican and Democratic presidential primaries and caucuses on March 5, with primaries taking place in states including: Alabama, Arkansas, California, Colorado, Maine, Massachusetts, Minnesota, North Carolina, Oklahoma, Tennessee, Texas, Vermont and Virginia.