Ambassador of the Republic of Lithuania to Ireland, Egidijus Meilūnas, presented his Letters of Credence to the President of Ireland, Michael Daniel Higgins, on 21 September 2017.

On 21 September 2017, Ambassador of Lithuania to the Holy See and to the Maltese Order, Petras Zapolskas, presented his Credential Letters to Pope Francis. At a private meeting, Pope Francis inquired about the situation and social life of Lithuanian believers and about emigration which continues to be a problem despite the economic indicators of Lithuania pointing to its positive economic development.

With the construction of Belarus's controversial Astravets nuclear power plant hurtling forward, the dissonance between Minsk and Vilnius over the project could not be greater. Lithuania -- whose capital lies less than 50 kilometers from Astravets -- has protested vehemently against the construction of the plant since it was announced in 2008.

Along with objecting to Minsk's decision to build the plant so close to Vilnius -- which along with Astravets is in a seismic-activity zone -- Lithuanian officials are concerned that Minsk has not allowed a full inspection by the International Atomic Energy Agency (IAEA). Adding to the worries in Vilnius is the secrecy of Belarusian officials when faced with 10 accidents and three deaths that occurred during the construction of the plant, which began in 2013.

"Regretfully, from the very beginning the Belarusians never discussed any of these issues with us," Darius Degutis, appointed in January as Lithuania's envoy for issues related to the Astravets nuclear plant, told RFE/RL.

At the Human Dimension Implementation Meeting 2017 of OSCE participating states in Warsaw on 21 September, Lithuania together with its international partners convened a meeting, entitled ‘LGBTI persons outside the Law in Chechnya (Russia). What should be the international community’s  reaction?’ The side event focused on recent hate crimes committed against LGBTI persons in Chechnya.

On 19 September, the Ambassador of Lithuania to the Holy See and the Sovereign Order of Malta Petras Zapolskas presented his letters of credence to the Lieutenant of the Grand Master of the Sovereign Order of Malta Giacomo Dalla Torre del Tempio di Sanguinetto.

At the Community of Democracies (CoD) Governing Council Ministerial meeting in Washington D.C., on 15 September, the Lithuanian delegation was headed by the Ambassador of Lithuania to the United States of America Rolandas Kriščiūnas.

Lithuanian Embassy in Japan is organising a consular mission to Sydney and Auckland on November 9-14, 2017.

The session of the Meeting of the Parties to the Aarhus Convention on 14 September in Montenegro admitted that Belarus, when developing the Ostrovets nuclear power plant (NPP) project, had violated the right of the public under this Convention to receive information and to participate in environmental decision-making. Thus, it  has been acknowledged for the 3rd time that Belarus does not comply with its international obligations under the Aarhus Convention.

On 14 September, the Permanent Representative of Lithuania to the Food and Agriculture Organization of the United Nations (FAO), Ambassador Ričardas Šlepavičius presented his letters of credence to José Graziano da Silva, Director General of FAO.

During the 22nd session of the General Assembly of the United Nations World Tourism Organization (UNWTO) in China, Lithuania was elected to the Executive Council for 2018-2021 for the first time and re-elected as the Vice-Chairman of the Regional Commission for Europe.