More than three years after Myanmar's Aung San Suu Kyi's last junta-orchestrated public appearance, questions over the detained Nobel Peace Prize laureate's whereabouts and condition are mounting. Her family, diplomats and regional leaders are demanding proof that she is alive.

Suu Kyi is serving a 27-year sentence, recently commuted by one-third, on a series of charges that her allies said were fabricated to keep her out of politics.

More than three years after Myanmar's Aung San Suu Kyi's last junta-orchestrated public appearance, questions over the detained Nobel Peace Prize laureate's whereabouts and…