An attorney for Khloé Kardashian's troubled husband appeared in court in California to enter a no-contest plea on his behalf.
Lamar has also agreed to attend a three-month alcohol-education program, and will pay $1,800 in fines and penalties.
The 34-year-old basketball star was arrested on a DUI charge back in August, when a California Patrol Officer pulled him over for driving "too slowly" and in a "serpentine manner".
After failing field sobriety tests and refusing to take a chemical test, Lamar was booked on a DUI charge. His license was automatically suspended under California law.
The CHP said at the time of his arrest that Lamar "showed signs of intoxication".
A former star of the Los Angeles Lakers, Lamar is now hoping to restart his professional career. He recently trained with the LA Clippers — the last team he played for — and has met with team officials in the hope of resigning.