Robert Stewart became High Steward of Scotland on his father's death on 9 April 1326, and in same year parliament confirmed the young Steward as heir should Prince David die without a successor.
Robert Stewart mewariskan gelar High Steward of Scotland saat ayahnya wafat pada 9 April 1326, dan pada Juli 1326, Parlemen mengkonfirmasikan Steward muda sebagai pewaris jika Pangeran David wafat tanpa penerus.