<p>This study explores the international collaboration in Ukrainian scholarly publishing before and during Russia’s full-scale war against Ukraine. The dataset includes articles published by the National Academy of Sciences of Ukraine (NASU) and universities in Scopus-indexed journals between 2020 and 2023. First and foremost, Ukrainian scholars deserve respect for continuing to publish despite life-threatening conditions, mental strain, shelling and blackouts. The findings show that the share of internationally co-authored articles declined for NASU to 40% and rose for universities to 32.2%. For NASU, the decline can be attributed to disruptions in funding and research infrastructure caused by the war, which are crucial for its main research field, physical sciences &amp; engineering, as well as to a reduction in collaboration with Russia, its top collaborating country during 2020–2021. Apart from Russia in 2020–2021, Poland, Germany, the USA, and China were key international partners for both NASU and universities. The citation impact of internationally co-authored articles remained statistically unchanged for both NASU and universities. However, for universities, the share of the top 10% most cited globally increased in internationally co-authored articles. Universities consistently outperformed NASU in the citation impact of internationally co-authored articles in biomedical &amp; health sciences, while the citation gap in physical sciences &amp; engineering was rather negligible. International collaboration can help Ukrainian scholars overcome the disruptions caused by war. This requires corresponding financial initiatives and adjustments to research funding allocation approaches, both within Ukraine and from foreign countries. In turn, Ukrainian scholars can contribute to strengthening of Europe.</p>