WASHINGTON — After weeks of solo travel around the United States, the first lady, Melania Trump, plans to revive her child-focused project “Be Best” as she accompanies her husband on a weeklong trip through Europe, the White House said on Monday.

The trip, with diplomatic-and-golf-focused hops planned between Belgium, England, Scotland and Finland, will be a high-profile re-entry into the spotlight for Mrs. Trump, who has not done much with Be Best since starting it days before she was hospitalized for a kidney condition in May. She sat out the president’s visit to Quebec for the Group of 7 summit meeting and a later meeting in Singapore with Kim Jong-un, the North Korean leader, in June. In recent weeks she has instead focused on visits with immigrant children detained at the southwestern border.

Mrs. Trump will participate in at least two events in Europe, including one in London where she is expected to reference Be Best, said Stephanie Grisham, Mrs. Trump’s communications director.

Mrs. Trump will also meet with Philip May, the husband of Prime Minister Theresa May of Britain, while President Trump meets with Mrs. May.