WASHINGTON — The family of Jared Kushner, the president’s son-in-law and senior adviser, said it would pull back from buying the Miami Marlins baseball team — for now — after it emerged that the current owner is likely to be named President Trump’s ambassador to France.

Within days, the Marlins owner Jeffrey Loria is expected to be announced for the post, a diplomatic plum among the political appointments that presidents make, according to a person briefed on the process. Mr. Loria was a six-figure donor to Mr. Trump’s joint fund-raising effort with the Republican National Committee during the campaign, and a job in the administration has been a priority of the White House chief of staff, Reince Priebus.

But there is a hitch: Mr. Loria has been in discussions with Mr. Kushner’s father and brother-in-law to sell the team. The Kushners are not keen on the appearance of an ambassadorship-for-baseball-team swap.