Will my work experience of two years be considered as three years for the application?

No, your two years of work experience will be counted as exactly two years for your application, not three. Irish universities require the actual duration of relevant work experience as specified in their criteria.

Two years of experience is still valuable and can strengthen your profile, especially for programs that do not strictly require three years. If a specific program demands three years, you must meet that requirement by the program start date.