The Bureau of the Royal Household announced on 12 June 2026 that Her Royal Highness Princess Bajrakitiyabha Narendiradebyavati Kromluangrajasarinisiribajra Mahavajrarajadhita passed away peacefully at 19.48 hr on 11 June 2026 at King Chulalongkorn Memorial Hospital in Bangkok. 

Her Royal Highness had stayed in the hospital for medical treatment since 15 December 2022, after losing consciousness because of a heart condition. In April 2026, doctors detected an infection in the abdomen caused by inflammation of the large intestine. This made Her Royal Highness’s condition unstable, with low blood pressure, an irregular heartbeat, and abnormalities in blood clotting.

Although the medical team provided treatment for Her Royal Highness to the best of its ability. Her Royal Highness’s condition deteriorated and the Princess passed away peacefully on 11 June 2026 at the age of 47. 

His Majesty the King has graciously issued a Royal Command directing the Bureau of the Royal Household to arrange the royal funeral rites, with the highest honors accorded to the Princess in accordance with royal tradition. The royal remains will lie in state at Biman Rataya Pavilion within the Grand Palace.