Minister Tanja Fajon, representing one of 34 countries, signed the Ljubljana-The Hague Convention on International Cooperation in the Investigation and Prosecution of the Crime of Genocide, Crimes against Humanity, War Crimes and Other International Crimes. The Convention was adopted in Ljubljana in May 2023 after a decade of effort and hard work by Slovenian diplomats and international law experts.

On 14 May 2023, the Embassy of the Republic of Slovenia, together with the Honorary Consul of the Republic of Slovenia in Ulaan Baatar, Dr. Bolormaa Batbayar, set up a tent for Europe Day at the main Sukhbaatar square.

After more than a decade of efforts by Slovenia, Argentina, Belgium, Mongolia, the Netherlands and Senegal, an international diplomatic conference has opened in Ljubljana to adopt the text of a convention on international cooperation in the investigation and prosecution of the most serious crimes. The Conference will run until 26 May. Upon adoption, the convention will be called the Ljubljana-Hague Convention.

Ljubljana hosted political consultations between Slovenia and Mongolia, which were headed by of State Secretary of the Ministry of Foreign and European Affairs Samuel Žbogar and State Secretary of the Ministry of Foreign Affairs of Mongolia Ankhbayar Nyamdorj.

State Secretary Stanislav Raščan received Ambassador of Mongolia Battungalag Gankhuurai on a farewell visit at the end of her term of office at the Embassy in Vienna accredited to Slovenia.

On 15 October, State Secretary Gašper Dovžan and Ambassador of Mongolia Gankhuurai Battungalag signed the Visa Waiver Agreement for holders of diplomatic and service passports, the first agreement signed between the two countries since the establishment of diplomatic relations.