The corporatization of agriculture across Asia has intensified rural marginalization, displacing small food providers and undermining traditional food systems. As land, water, and forests are privatized for profit, rural communities face escalating threats, from land grabbing and forced displacement to hunger and loss of cultural food practices. Despite mounting global food demands, governments continue to prioritize corporate agriculture, free trade agreements, and industrial food production over sustainable, community-led alternatives. Against this backdrop, food sovereignty has emerged as a powerful counter-narrative, advocating for the rights of small-scale food providers to determine their own agricultural policies, protect traditional knowledge, and resist neoliberal exploitation. Rooted in redistributive agrarian reform, agroecology, and seed sovereignty, this movement mobilizes grassroots actions to reclaim food systems from corporate control. Case studies from Indonesia, the Philippines, and Thailand highlight how social movements, including La Via Campesina-affiliated organizations, strategically engage in policy advocacy, direct action, and community-led initiatives to advance food sovereignty. While significant challenges remain, including policy co-optation and internal movement pressures, the struggle for food sovereignty represents a critical site of resistance and transformation. By reclaiming the right to land, seeds, and local food systems, rural movements in Southeast Asia are reshaping agricultural futures based on social justice, ecological sustainability, and self-determination.