A member of the city Sanitation Department’s police force was given a three-day, unpaid suspension after he copped to using his parking permit for his personal car.

Twenty-year Sanitation Department vet Carlos Rodriguez admitted to using a city-issued placard — intended for agency cruisers only — to plop his own car in a no-parking zone near his home, the city’s Conflicts of Interest Board said Thursday.

“I took a DSNY police placard that was intended for use in a DSNY police vehicle,” Rodriguez confessed in a disposition posted on the COIB’s website.

“On Nov. 3, 2017, I placed the DSNY police placard… on the dashboard of my personal vehicle in order to park that vehicle illegally on a street near my home.”

COIB charged Rodriguez with “using a city resource for a non-city purpose,” in violation of the City Charter.

Last month, the city council passed a multi-pronged plan to rein in placard abuse, a practice rampant among city workers that is rarely punished.

Rodriguez, who public records show earned $99,000 in 2018, lost $928 in wages as a result of the suspension, which went into effect on Nov. 26.

He could not be reached for comment.