The shift away from traditional foreign policy roles and the redefinition of national identity through “identity-based regionalism” reflect a reorientation in the Islamic Republic of Iran’s approach to the Eurasian Economic Union (EAEU). Beyond a response to sanctions, this engagement stems from changes in Iranian elites’ “perceptual geography” and the reconceptualization of Iran’s position in the emerging global order. This study examines how Iran’s regional standing is enhanced through integration, using constructivism as its theoretical framework. Through an explanatory-analytical approach and analysis of policy documents, it identifies meanings shaping Iran’s regional diplomacy. Findings show that engagement with Eurasia operates through three mechanisms: constructing Iran as a strategic nexus; institutionalizing normative interdependence through de-dollarization; and reproducing Iran’s identity as a structuring power. These mechanisms facilitate a shift from national interests associated with a revisionist actor toward Iran’s positioning as a stabilizing regional pole. This structure-shaping diplomacy enhances Iran’s standing, consolidates its structural indispensability within the global power configuration, and creates opportunities to expand Iran’s norm-shaping agency in regional arrangements and participate in formulating the rules of the emerging order.