The diplomats did not make any comments following the visit. Butina was arrested in Washington, DC on Sunday and charged with conspiracy to act and acting as a foreign agent.
On Wednesday she denied both charges in federal court in Washington but was remanded in custody without bail, as she is considered a flight risk. She faces up to 15 years in jail.
Russian Ambassador to the United States Anatoly Antonov said on Wednesday that the Russian Embassy in the United States was doing everything possible to arrange a meeting with Butina and solve her problem as quickly as possible.
Russian Foreign Ministry spokeswoman Maria Zaharova said Butina was detained right before the summit between US President Donald Trump and Russian President Vladimir Putin in Helsinki in an effort to minimize the positive outcomes of the meeting.