Ambassador of Sri Lanka to Thailand and Permanent Representative to the UNESCAP Wijayanthi Edirisinghe, paid a courtesy call on Deputy Prime Minister and Minister of Interior of Thailand Anutin Charnvirakul, on 9 April 2025 at the Ministry of Interior in Bangkok.

Prime Minister of Sri Lanka, Dr. Harini Amarasuriya, participated in the 6th Bay of Bengal Initiative for Multi-Sectoral Technical and Economic Cooperation (BIMSTEC) Summit held in Bangkok, Thailand on 3–4 April 2025. The Summit, hosted under the theme of regional resilience and prosperity, brought together leaders of the seven BIMSTEC Member States to strengthen cooperation and chart a forward-looking agenda for the region.