The Kiss frontman, 64, said in an interview that those suffering from the illness should kill themselves and that he was “the guy who says ‘jump!’” when he sees someone on top of a building.
But after a fierce backlash to his “moronic” opinion which saw several radio stations ban Kiss’ songs from their airwaves, Simmons posted a statement on his Facebook page.
“I was wrong and in the spur of the moment made remarks that in hindsight were made without regard to those who truly suffer the struggles of depression,” he wrote.
“I sincerely apologise to those who were offended by my comments. I recognise that depression is very serious and sad when it happens to anyone, especially loved ones.
“I deeply support and am empathetic to anyone suffering from any disease, especially depression.”
Quotes on depression
Quotes on depression
1/14 Alistair Campbell
Alistair Campbell: "One day, we will look back and wonder how on earth we used to believe that depression was a lifestyle choice, only to be debated and taken seriously when an A List film star took his life, and the world filled with people saying how shocked and saddened they were. "
2/14 On living with depression
Stephen Fry: "Depression is as real as the weather…it’s all about a kind of mental umbrella. 'Hey-ho, it’s raining inside: it isn’t my fault and there’s nothing I can do about it, but sit it out. But the sun may well come out tomorrow and when it does, I shall take full advantage.'"
3/14 On living with depression
Ernest Hemingway: "The world breaks everyone, and afterward, some are strong at the broken places." (He also said "happiness in intelligent people is the rarest thing I know")
4/14 On living with depression
Jonathan Davis: "A lot of people don't realize that depression is an illness. I don't wish it on anyone, but if they would know how it feels, I swear they would think twice before they just shrug it."
5/14 On passing judgement on depression
Geoffrey Boycott: "Until you've had depression I don't think you're qualified to talk about it."
6/14 Jack Dee
Jack Dee: "I have had issues with depression all my life, and it's probably true to say there was a tendency towards it even when I was very young, during my schooldays. There was often - and this is quite common with comics - a sense of not feeling as if I belonged anywhere."
7/14 On living with depression
Jason Manford: "The world needs you even if you don't think it does. I promise, we need you here, now."
8/14 Author Jeanette Winterson
Art saved me; it got me through my depression and self-loathing, back to a place of innocence.
9/14 On life and depression
Agatha Christie: "I like living. I have sometimes been wildly, despairingly, acutely miserable, racked with sorrow, but through it all I still know that just to be alive is a grand thing."
10/14 On living with depression
Albert Camus: "In the midst of winter, I finally learned that there was in me an invincible summer."
11/14 On dealing with low mood
Dolly Parton "The way I see it, if you want the rainbow, you gotta put up with the rain."
12/14 If you're feeling depressed right now..
Annabel Giles: "If you’re depressed right now, then let's remember that we only have to do today, that's all. Nothing more. We can do just a day, can't we? And don’t forget, we haven't always been like this. The good days will come back. We've just go to do as much as we can, when we can."
13/14 Helen Keller on looking for the positive
Helen Keller: “When one door of happiness closes, another opens; but often we look so long at the closed door that we do not see the one which has been opened for us.”
14/14 On it happening to all of us
Mariella Frostrup: "Only those with skin as thick as elephant hide can hope to sail through their teens unscathed by self-doubt and bouts of depression."
Simmons’ apology has been accepted by Motley Crue bassist Nikki Sixx who was among the first to call him out on his words.
“Gene said something that has been addressed and maybe in a moment of bravado he was just being cocksure and pompous?, “ he wrote online.
“When people are listening we have an opportunity to pass along some valuable and positive information.”
Simmons had been criticised just days earlier by garage rockers Black Lips for creating “misogynistic” and “sexist” music with his Seventies band.