The White House announced that the State Department will prevent some Ugandan officials from entering the U.S., and cut or redirect funds from Uganda's aid package.
Uganda's virulently antigay foreign minister will take office in September.
On Wednesday, the United Nations General Assembly is set to elect Uganda's foreign minister as president. LGBT advocates say that spells bad news for the international body.
The investigation prompted false reports of the closure of the Refugee Law Project, based at Uganda's Makere University.
Aidah Asaba has been told to prepare for deportation Saturday to a nation with a virulently homophobic climate, but activists are pleading her case in a variety of ways.
Sexual Minorities Uganda reports more than 160 incidents of violence and harassment against Ugandans perceived to be LGBTI since the nation's parliament ratified the Anti-Homosexuality Act six months ago.
LGBT Ugandans and allies staged a protest outside a London hotel where President Yoweri Museveni was speaking, while the first LGBT people to face formal charges for gay sex were granted bail.