The institute of changed cirumstances may lead to adaption or termination of contract in accordance with the provisions of the Croatian legal order. That being said, this thesis deals with the relevant Croatian legal past up to the present day with regard to this legal institute and its development has been processed. In the case of disputes with an international character, the regulations governing such business enable the application of its version of the Institute of Adaptation or Termination, which unifies and encompasses and is based on the spirit of such legal norms that are regulated through various national legislations, which are based on the practice of the courts and the needs of the international trade, therefore the principles governing the conduct, rights and obligations of the contracting parties. The presumptions of the application of the changed circumstances when deciding on the amendment or termination of the contract are explained in more detail, the problem of the interpretation of international provisions is determined, depending on the current view of the changed circumstances that depend on the understandings of national judicial authorities, as well as the possible outcomes of solving legal situations due to the provisions that enable a broader and more comprehensive interpretation of prescribed legal norms. Taking into account the aforementioned interpretations or opinions, precisely Opinion no. 7 and Opinion no. 20., legally relevant and recognized experts within the Advisory Council of the UN Convention on Contracts for the International Sale of Goods from 1980.