The Global South is grappling with a deepening public debt crisis that threatens sustainable development and global economic stability. Between 2010 and 2024, public debt in the global south surged from USD 8.6 trillion to USD 32.2 trillion, growing nearly fourfold and outpacing GDP growth, which increased only 1.8 times. As a result, the public debt-to-GDP ratio doubled to 76.2 percent, driven by high borrowing costs, sluggish economic performance, and external shocks such as the COVID-19 pandemic. By 2023, the Global South accounted for 45 percent of global GDP but carried 31.6 percent of global public debt, with external debt tripling to USD 3.45 trillion and per capita debt reaching USD 166,762. Mounting interest paymentsamounting to USD 921 billion and consuming 14.29 percent of government revenue-are diverting resources from critical areas like health, education, and infrastructure, affecting 3.3 billion people. The financing gap for the Sustainable Development Goals (SDGs) has widened to over USD 4 trillion, exacerbated by a 7.1 percent decline in Official Development Assistance (ODA) in 2024. This paper brief examines the causes, consequences, and potential solutions to this crisis, advocating for expanded debt relief, increased ODA grants, and strengthened debt management to ensure sustainable development.