Device embolization is a rare major complication of atrial septal defect percutaneous closures that requires surgical management if non-invasive retrieval fails. We report a symptomatic delayed embolization of an Amplatzer septal occluder device into the left ventricle outflow tract tangled with the mitral valve, complicated with ventricular arrhythmias and cardiac tamponade during percutaneous retrieval attempt. Emergent surgical treatment was performed, requiring combined approach through the right atrium and the aorta for surgical removal.