Mahzad Zaza Mir was titled Queen of the Universe Iran 2015 and represented Iran at the Queen of the Universe 2015 international pageant held with contestants from various countries across the world. She participated as part of Iran’s representation in an international platform that focused on elegance, cultural diversity, and stage performance. The competition brought together delegates from many regions, each showcasing their individuality through interview segments, evening wear presentations, and stage presence.

During the event, Mahzad Zaza Mir competed alongside contestants from Asia, Europe, Africa, and the Americas, contributing to the global representation of Iranian participants in modern pageantry. Her involvement reflected the growing participation of Iranian representatives in international beauty competitions during the mid-2010s, where emphasis was placed not only on appearance but also on confidence, communication skills, and cultural expression.