Rough idle, smell of gas and bad idle

So pretty much my mothers car has the following issues strong smell of gas bad idle.the code shows a miss fire on cylinder 3we have changed plugs coils and the fuel pump i dont know what else could cause this the issues accoured after hiting a deer the car is still drivable but struggles to start some times

You need to take this car to a local mechanic and have it checked out. In addition to inconvenience you have a possible fire.