The Tribhuvan Sadan (Nepali: त्रिभुवन सदन) is a mansion in the Narayanhiti Palace, Kathmandu, Nepal.

[1][3] It was later occupied by Dipendra, Crown Prince of Nepal who had lived with his family at the Shree Sadan, but, he had moved after the coronation of King Birendra as the king of Nepal as he was not allowed to live with his father until he turned 18 due to royal tradition.

[2][4] On 1 June 2001, the infamous Nepalese royal massacre took place in the Tribhuvan Sadan where ten members of the royal family, including King Birendra, Queen Aishwarya, and Crown Prince Dipendra, were killed in a mass shooting.

[5] The Tribhuvan Sadan was demolished after the orders of the Queen Mother Ratna Rajya Lakshmi Devi Shah.

[10] In 2009, then Prime Minister Madhav Kumar Nepal said in a speech that the Tribhuvan Sadan would be rebuilt.