The latest cases were reported in the National Capital District.
A 44 year old female who works at a government department and resides in the Moresby South electorate, is one of the three confirmed positive.
She was not showing symptoms of COVID-19 at the time of testing, but her swab samples returned positive.
Also tested positive is a 45 year old male, who was experiencing sore throat, headache and shortness of breath at the time of testing.
The third reported case is a 31 year old male employee of Exxon Mobil LNG plant site.