IWRM is a complete method for managing water, land, and related resources. It aims to get the most social and economic advantages while keeping the environment healthy. This research looks at how important IWRM is for solving global water problems. It especially examines how IWRM fits with the goals of Sustainable Development, focusing on SDG 6, which is about clean water and sanitation. Using a secondary data analysis methodology, information from periodicals, government reports, research articles, and global water resource databases was reviewed. The study evaluates IWRM's impact on sustainable water resource management, identifies barriers to its implementation, and explores stakeholder engagement's critical role. The findings highlight that IWRM guarantees water availability for agriculture, industry, and domestic purposes while minimizing disputes over resource distribution. It plays a vital role in ecosystem preservation, biodiversity restoration, and addressing climate change challenges such as water scarcity, floods, and droughts. However, challenges like resource overexploitation, fragmented management, water pollution, and climate change remain significant. Principles of equity, efficiency, and sustainability are emphasized to achieve long-term water security. The study highlights the importance of stakeholder participation, policy coherence, and technological innovations such as IoT, GIS, and AI in enhancing IWRM outcomes. Concluding that IWRM is essential for a sustainable future, it stresses collaboration among governments, private sectors, and communities to overcome global water challenges.