The 43-year-old "Drop It Like It's Hot" hitmaker was a passenger in a vehicle that was pulled over after a concert because police in the city of Uppsala suspected the star was intoxicated, reported E! Online.
Police spokesperson Daniel Nilsson said, "Police carrying out roadside controls noticed that Snoop Dogg (whose car was pulled over) seemed to be under the influence of narcotics. He was arrested and taken to the police station to take a urine test.
"The incident lasted several minutes. Once the test was carried out, he left."
In one message, he wrote, "To all my Sweden fans you can blame your police dept for never seeing me again in your beautiful country... And I'm still smokin (sic) (marijuana)... I am sick and tired of the pigs (police)."
Nilsson has denied allegations the traffic stop was racially-motivated.
Results from the rapper's drug test are expected to be made available in two weeks. If it tests positive for drugs, Dogg could face a fine.