The lack of resources in the modern world necessitates the reorganisation of the conventional linear economy into a new, circular model of economic development, and this requirement is even more urgent for a country at war. The purpose of this study was to prove the necessity and possibility of achieving sustainable development goals even in a crisis, using evidence from Ukraine. Using such methods as statistical analysis, comparison, and synthesis, the dynamics of sustainable development in the European Union and Ukraine were investigated. In addition, relevant experts were interviewed via an online survey. The study obtained and analysed statistics on the transition of European countries to clean energy sources, conducted a detailed investigation of the current legislative framework and state institutions of Ukraine related to recycling war waste, strengthening the digitalisation of Ukrainian society, and studied wartime circular recycling measures. Statistics on the factual destruction and pollution of the environment as a result of hostilities and the temporary occupation of some territories were also examined. Furthermore, information was collected and systematised from the management of Ukrainian manufacturing enterprises on the factual implementation of circular economy principles during the war. The analysis of the data obtained led to the conclusion that the crisis only increases the need to save resources. The practical significance of the study lies in proving that there is no alternative to the goals of sustainable development in the future and emphasising Ukraine’s competitive advantages in this area during the post-war reconstruction. These proposals will be useful for private investors who can profitably finance Ukraine’s future recovery in line with the principles of the circular economy