Nauert is the latest transplant from Fox News to be elevated to positions in the White House.
It was unclear whether Khalid bin Salman, the crown prince’s brother, would resume his duties.
Secretary of State Mike Pompeo put Moscow on notice but also gave Europeans more time.
In contrast to predecessors, the president has cut back on international trips amid mounting political concerns in Washington
Lawmakers have demanded a briefing from the CIA on the killing of Saudi journalist Jamal Khashoggi.
The unconventional president known for blowing up international summits appears to be pursuing a more conventional schedule at the Group of 20 meeting later this week.
The move could limit U.S. assistance and prohibit financial transactions.
The State Department documented atrocities in Myanmar but left out a legal determination that critics say blunted its impact. This week’s talks in Singapore reflected the same stance.
New sanctions are part of the Trump administration’s pressure campaign against Iran and its proxy forces.
Starting in the 1990s, the North Koreans and Americans had worked jointly to recover remains for more than a decade, but the cooperation was suspended during the George W. Bush era amid political tensions.