"We had hoped that you — as someone we and many others have celebrated for your commitment to human dignity and universal human rights — would have done something to condemn and stop the military's brutal campaign and to express solidarity with the targeted Rohingya population," the museum said in a letter to Suu Kyi dated Tuesday and addressed to her via the Myanmar Embassy in Washington.

Instead, the letter said, she and her political party, the National League for Democracy, have refused to cooperate with United Nations investigators, blocked access to journalists and "promulgated hateful rhetoric against the Rohingya community."

The museum's decision is perhaps the strongest rebuke yet of Suu Kyi, who has been increasingly criticised as a seemingly unrepentant apologist for Buddhist nationalism and the Myanmar military's campaign of ethnic violence.

Beginning in August, Myanmar's military, joined by armed Buddhist civilians, systematically killed thousands of Rohingya in the western state of Rakhine. As many as 700,000 more fled across the border to Bangladesh, where they remain in sprawling refugee camps. Behind them, soldiers moved in to burn their villages and bury the dead in mass graves.

Suu Kyi has refused to even utter the word Rohingya in public. In private, she becomes angry when the topic comes up, according to people who have spoken with her.