On 28 October 2025, Ambassador Arunrung Phothong Humphreys, together with officials of the Royal Thai Embassy, members of Team Thailand, staff, and their spouses, signed the book of condolences in tribute to Her Majesty Queen Sirikit, the Queen Mother, at the Royal Thai Embassy. On the same day, members of the diplomatic corps in Sweden and Thai nationals also came to sign the book of condolences.

The Royal Thai Embassy in Stockholm is open for the general public and Thai people to sign the book of condolences from 27 to 31 October 2025, between 09.30 hrs. and 16.30 hrs.