The most likely cause is that the left front brake is not providing enough braking force.

There are several things that could cause this, including:

---Brake pads/rotor are contaminated or glazed

---The caliper is mechanically sticking

---A problem in the hydraulic circuit

Have the brake system inspected by a competent professional mechanic.

Good luck.

You probably need work on the brakes. The front ones are usually the ones that go out first. There probably is no lining left on the left side.

Your brakes need immediate attention from a mechanic. I suspect the front brakes are in need of replacement..at the very least an adjustment and most modern brake systems are self adjusting.