Melania Trump, who has been mostly absent from public view while her husband, Donald J. Trump, campaigns for president this year, will appear at a fund-raiser at Mar-a-Lago on April 20 for the Log Cabin Republicans, the group’s president said.

The event, which was first reported by Politico, is a return of sorts to the political arena for Mrs. Trump, who has consistently stayed away from campaign events.

Mr. Trump has insisted for months that Mrs. Trump would join him on the trail. He invokes her often during his rallies, to cheers from the crowd, even as she has not traveled with him. And she did not join him at a Super Tuesday party at Mar-a-Lago, the couple’s home in Palm Beach, Fla.

Last month, Mrs. Trump made a rare public appearance with Mr. Trump, accompanying him when he cast his ballot during Florida’s primary. When asked if she would appear more regularly this year, Mrs. Trump replied, “Stay tuned.”

Mrs. Trump remains a popular surrogate for the former president, but she has shown little interest in hitting the campaign trail.

The fund-raiser for the Log Cabin Republicans, a group of L.G.B.T. conservatives, will still keep her largely out of the public eye. The group’s president, Charles T. Moran, said that Richard Grenell, Mr. Trump’s former ambassador to Germany, was also set to appear.

Mrs. Trump has maintained ties to the Log Cabin Republicans for years. In a financial disclosure last year, she reported receiving a $250,000 payment from the group in December 2022. On Twitter that month, the group posted a photo saying she was the special guest at a “private dinner” and thanking her for “continuing the projects she worked on while in the White House.”

Mrs. Trump’s few public appearances over the last year have been largely disconnected to Mr. Trump’s campaign. Last month, she joined Mr. Trump as he hosted Viktor Orban, the prime minister of Hungary, at Mar-a-Lago.

In January, she delivered a eulogy at the funeral for her mother, Amalija Knavs. And she gave a speech last December at a naturalization ceremony in Washington, where she told new American citizens that citizenship meant “actively participating in the democratic process and guarding our freedom.”

In November, she joined Mr. Trump at a funeral for his older sister. And she attended a memorial service for Rosalynn Carter with other first ladies from both parties. It was the first occasion that all of the living first ladies had been in one place since George H.W. Bush’s funeral in 2018.