3 snipers? Do you mean the parade mission with Takemura?
If so when you take out the 3rd sniper you recieve a call from Takemura telling you you need to now take out the netrunner, events happen that finish that mission then you get another where events happen that lead to a fade to black then V sitting in a chair with a shotgun in a motel waiting.
Your game has heavily bugged out if thats the case, i mean seriously, hopefully you have a save before that mission, if not i honestly know of nothing but a new character, i mean your missing the full endings, your talking 5 hours with just that and thats not including the various ones nor the side content that opens just before