The digital revolution has significantly impacted global politics, including international negotiations and diplomacy— traditionally regarded as highly conservative within human affairs. These domains must adapt to the emerging realities of digital life. The metaverse, as the fourth generation of the web, is still in its early stages, yet is already transforming the nature of diplomacy and diplomatic processes. This study explores the future transformations that diplomacy may encounter within the metaverse environment as well as the opportunities and challenges it presents for diplomacy. Drawing upon a technological instrumentalism framework and employing descriptive-analytical methodology with desk study and online sources, the findings demonstrate that the expansion of the metaverse worldwide leads to a reduction in the costs of diplomatic activities, resolution of disputes over negotiation locations, continuity of diplomatic processes in times of crisis, environmental benefits through reduced pollution, increased roles for multiple actors in diplomatic processes, enhanced cultural diplomacy, and the overcoming of language barriers. Nevertheless, the metaverse also poses significant challenges in areas such as security, privacy, and the proliferation of misinformation, thereby affecting the future of diplomacy.