Dana, at the age of 26, disappeared from her residence August 30, 1999 without personal items including identification and medication. She has not communicated with her family or loved ones since.
Here is the Missing Persons listing on the Hamilton Police Service site. The Doe Network listing gives far more information, however, noting that she was pictured in a Hamilton Spectator photograph on September 17, 1999 after she had been declared missing (August 30, 1999).
The Doe Network listing also mentions that she was in contact with a friend a year after her disappearance, and that another friend saw her another year after that, though there is no publicly available evidence to substantiate those claims.
A beautiful portrait of Dana Zelic was painted by artist Ilene Sova and can be seen here.