Deputy national security adviser Nadia Schadlow has resigned, as new national security adviser John Bolton seeks to reshape his team.

Schadlow is the third high-ranking national security official to exit or be pushed out of the White House since Bolton took over on Monday.

“The administration thanks Dr. Schadlow for her service and leadership," said White House spokesman Raj Shah. "We wish Nadia and her family the best.”

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An administration official said that Schadlow will remain in her post until April 27 in order to assist with the transition to her successor.

Schadlow was a trusted confidante of Bolton’s predecessor, H.R. McMaster, and played a key role in crafting President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE’s national security strategy, which was released last December.

"The strategy has set a strong foundation going forward for protecting the homeland, promoting American prosperity, preserving peace through strength and advancing American influence," said Shah.

She was tapped in January to take over for Dina Powell, who decided last year to step down as deputy national security adviser for strategy.

National Security Council spokesman Michael Anton and homeland security adviser Tom Bossert are the other two officials who have left following Bolton's start.

The hard-charging former U.S. ambassador to the United Nations is expected to make more staff changes on the National Security Council in the coming days and weeks.