Upvote:3
The AVATS guide from the immigration department states :
You will then be asked if you have ever been refused permission to enter Ireland. Have you ever arrived at a Port of Entry to Ireland and been refused entry by an Irish Immigration Officer? This will include any time you were refused entry to Ireland by an Irish Immigration Officer after travelling to Ireland with a visa, without a visa, with preclearance, or without preclearance.
Have you ever been deported from Ireland, or received notification that you are subject to Deportation?
Have you ever been refused a visa for a country, other than Ireland?
Have you ever been refused entry to, deported from, or otherwise asked to leave a country other than Ireland?
If you answer βYesβ to any of these 4 questions, you must give details, including the country concerned, dates and the reason.
If you don't remember the reason for the refusal, you may want to file a request for visa records to the Department of State.
How to do so is explained on this DoS website