**Missouri Amendment 3**, a legislatively referred constitutional amendment on the November 3, 2026 ballot, seeks to repeal the 2024 voter-approved reproductive rights provision and impose near-total abortion limits with narrow exceptions for medical emergencies, rape or incest up to 12 weeks, and fetal anomalies, while adding a permanent ban on gender transition procedures for minors. The measure cleared the legislature in 2025 with strong Republican support. Traders assign a 68.5% probability to rejection primarily because the 2024 amendment passed narrowly and established constitutional protections that voters have shown willingness to defend. Organized opposition, including the Stop the Ban campaign, highlights the repeal effort and ballot language challenges resolved by courts in 2025. Although polls indicate broad support for restricting gender-affirming care for minors, the bundled abortion restrictions appear to limit overall appeal in a state where recent court rulings have restored access under the existing constitutional framework. The race remains subject to turnout and late campaign dynamics.