5,300 people have had face-to-face appointments with Pieta House's suicide-prevention service this year.
The charity expects to break last 2018's record high of just over 8,000.
Today is World Suicide Prevention Day, and people are being asked to light a candle to mark it tonight.
Pieta House's Sinead Raftery says one in seven adults has experienced mental health issues over the past year.
"We all have mental health," said Ms Raftery. "So one in seven of us might have experienced mental health issues in the last 12 months but seven out of seven of us have mental health.
"And we all need to protect our mental health.
"I think, certainly, more people are reaching out and are accessing services and getting help."
Pieta House called for people to "use World Suicide Prevention Day to reach out to those that may need help but can't ask."
Use World Suicide Prevention Day to reach out to those that may need help but cant ask. If you have been or are currently in a state of suicidal crisis, please know we are here for you. Call our 24-hour Freephone helpline 1800 247 247 or text HELP to 51444 #WSPD #WSPD2019 pic.twitter.com/lBmd7SUZel— Pieta House (@PietaHouse) September 10, 2019
If you or someone you know has been affected by mental health issues you can contact: