The first female US ambassador to Russia is leaving her role after serving through one of the most difficult periods in relations between the two countries.
Lynne Tracy, who has been based in Moscow, said she is "proud to have represented my country" in the Russian capital "during such a challenging time".
There is no suggestion she has been removed from her role by the Trump administration.
The departure of the career diplomat appointed by former president Joe Biden comes as Russia and the United States discuss a potential reset in their ties, which sharply deteriorated after Moscow launched its full-scale war in Ukraine in February 2022.
President Donald Trump has said there are potentially big investment deals to be struck, but is growing increasingly frustrated that his efforts to broker a peace deal to end the war in Ukraine have so far not resulted in a meaningful ceasefire.
In a statement shared by the US embassy in Russia on Telegram, Ms Tracy said: "As I leave Russia, I know that my colleagues at the embassy will continue to work to improve our relations and maintain ties with the Russian people.
"I have been inspired by my meetings with Russians who love their country and work every day for a better future. I would like to conclude with lines from Pushkin's poem 'To Chaadayev', which speak of the love for the Motherland that lives in each of us. Goodbye!"
The embassy said it wanted to "express our gratitude for her contributions based on consistent diplomacy, deep respect for Russian culture, and dedicated service to the American people".
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In a statement earlier this month, the embassy said Ms Tracy, who arrived in Moscow in January 2023 and was greeted by protesters chanting anti-US slogans when she went to the foreign ministry to present her credentials, would leave her post soon.
She was notably involved in efforts to win the release of US citizens jailed in Russia, including journalist Evan Gershkovich and former marine Paul Whelan, who were eventually freed in August 2024 as part of a big East-West prisoner swap.
Ms Tracy, who took over from John Sullivan, had previously served as the second-highest official at the US Embassy in Moscow, the deputy chief of mission, from 2014 to 2017.
She was the ambassador to Armenia at the time she was nominated to replace Mr Sullivan after he retired.
Ms Tracy, who speaks Russian, had also worked at US diplomatic outposts including Turkmenistan, Pakistan and Kazakhstan. She majored in Soviet Studies and holds a law degree.
(c) Sky News 2025: First female US ambassador to Russia to leave her role
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