European leaders from France, the United Kingdom, and Germany have consistently framed their regional role as limited to defensive measures and diplomatic engagement since the onset of direct US and Israeli operations against Iran in late February 2026. Joint statements have condemned Iranian missile and drone strikes on allies while pledging only proportionate responses to protect shipping lanes and personnel, such as naval deployments to the Strait of Hormuz, without authorizing strikes on Iranian territory. Domestic political pressures, economic risks from energy market volatility, and public opposition to escalation have reinforced this stance, aligning with ongoing efforts to revive negotiations. Trader consensus at 95.9 percent for “No” reflects these structural constraints, though a direct Iranian attack on European assets or bases before the June 30 resolution date could still prompt a reassessment.