Kaslow said it's most important to pay attention to those around you.
"People need to be sensitive to how people around them are doing," Kaslow said. "When people are talking about 'I lost all this in the market,' you've got to stop and say, 'OK, we can talk about the money part of this. ... Are you going to be OK with this?'"
According to Conwell, those who are at the highest risk for suicide don't necessarily have the most stress, but lack such emotional support in combination with their other risk factors.
"Those who are more vulnerable to suicide are also those for whom stress has a particularly devastating effect," Conwell said. "It doesn't happen out of the blue, they are vulnerable in a number of ways."
Radha Chitale contributed to this report.