https://mangadex.org/title/42125/i-will-die-soon
https://mangadex.org/title/486/jisatsutou
it has the sol but I hardly think it qualifies in the way people normally think of slice of life. See description below.
Treating non-successful suicidal patients requires a lot of money and resources. With low budget and a personal respect argumentation, a doctor will ask a non-successful suicidal patient if he/she still wants to live on or not. If not the government will respect his/her wish. However, the government doesn't just simply kill them...