In March 2020 finished the era in Uruguay’s political life: the Broad Front coalition, which has been in power since 2005, transferred power to the coalition government of the right-wing forces that won the general election of 2019. This article analyzes the state of the left movement in the first two decades of the new century in the context of the traditions of the Komintern. The article discusses the process of formation of tactics, strategies and programs of the Communist Party in the XX century, shows the influence of the Komintern era on the political life of the Uruguayan left-wing forces in the 1950–1980s. Based on the media, expert opinions, governmental and party documents, the article shows the current challenges and features of the Uruguayan left-wing movement, as well as the influence of the III (Communist) International on the political practice and theory of the Uruguayan left movement, tactics and program of the Broad Front coalition. The author examines the process of the formation of the structure of the left movement, the evolution of its program, strategy and tactics and concludes that the activities of the modern left in Uruguay have features created by the Komintern at the beginning of the last century: the role of agrarian and trade union issues in the party program, the tactics of creating broad alliances to achieve electoral results, problems of personnel, the principles of internationalism.