WHILE DRIVING IN THE RIGHT LANE ON A 3 LANE HIGHWAY AT APPROX. 65MPH, WHILE FEELING THE VEHICLE JERK TO THE RIGHT, THRUSTING THE VEHICLE ONTO THE RIGHT SHOULDER. WHILE TRYING TO COMPENSATE TO THE LEFT, THE VEHICLE, IMMEDIATELY ROLLED 3-4 TIMES ACROSS THE 3 LANES OF TRAFFIC, ONTO THE LEFT SHOULDER. THE LEFT REAR AXLE AND WHEEL WAS NO WHERE TO BE FOUND.