Look here- thats only a dream, they dont come true, some dreams have alot of meaning, so i think you should take it into deep consideration and see what you need alright?
do you feel guilty for anything? if you do try to talk about it with them, if they committed suicide in your dream, and you feel guilty you probably, did something that resulted in something that's happened, or that might happen- ... And them doing that for not being good enough parents? i don't know, spend more time with them or you guys arent transparent enough with each other
If you scream and you can't scream loud enough you might be trapped in something or you can't process it as if you wanna ask for help but you just can't, if you can try to..-
And last off im sorry that this happened to you- i dont know what else to say but im not a dream reader- but it might mean something yk-? and i hope you feel better cloud <3- :)-