From American Psychological Association on Covid 19 and suicide:
“But it will be a while before COVID-19’s actual impact on the nation’s suicide rate is known, says psychologist Jill Harkavy-Friedman, PhD, vice president of research at the American Foundation for Suicide Prevention. “We’re two years away from having data,” she says. And it’s not a given that the pandemic will cause suicide rates to increase, emphasizes Harkavy-Friedman, who is also an associate professor of clinical psychology, in psychiatry, at Columbia University.
“One event can bring stress, but it’s not going to make someone suicidal out of the blue,” she says, explaining that it is typically a combination of biological, psychological, environmental and other factors that renders people vulnerable to suicide.”
To point at quarantine as the sole reason for suicide is unhelpful and, I am sorry to say, a bit simplistic.
The sooner people listen to sensible advices of the experts which are based on good quality research (not anecdotes and conspiracy theories), the sooner we should be able to resume more or less normal life. That would help the emotionally vulnerable who may be at risk for self harming.