The brakes, suspension, and steering systems are all major safety components of any vehicle. If something is going wrong with one of them it can seriously affect the performance and the safety of the car.
There can be simple issues such as worn brake pads, the wheels being out of alignment or leaking steering fluid to the more severe issues like a warped rotor, bad tie rods or failing struts.
Regardless of the issues, getting the brakes, suspension and steering systems inspected and repaired is key to making the car safe to drive.