You kind of...flirt with it? Like in le circle, or how you just sort of flirt with the "r" in "le livre." It's not as pronounced as an english speaker would make it in our language.
Sometimes, you don't even really hear that last consonant. When some people say "peut-être" (maybe), it just sounds like "pu-tet". Yet some say the "r" fully, like "pu-tetra."