BEIRUT, Lebanon — Five months after Saudi Arabia released a doctor with dual Saudi-American citizenship from jail, he and seven family members remain barred from leaving the kingdom while he stands trial on charges the United States contends are meritless, a son and a senior State Department official said.

The Saudi authorities detained the doctor, Walid Fitaihi, during what they called an anti-corruption campaign in late 2017 and released him pending trial last summer. He has told confidantes that Saudi jailers tortured him. The authorities have confiscated his family’s passports, leaving eight dual Saudi-American citizens stuck in the kingdom, the son and the official said.

“My family’s freedoms have been taken,” the son, Ahmad Fitaihi, 27, said by phone from California.

While United States diplomats have worked to restore the rights of Dr. Fitaihi and his family, President Trump has never spoken publicly of his case, leaving his son wondering why he has not received the same attention from the White House as other Americans detained abroad.

“President Trump has a great record in saving Americans, so why has he not saved my dad?” Ahmad Fitaihi said.