https://www.answers.com/american-government/Did_US_mint_a_3_cent_coin
Did US mint a 3 cent coin? - Answers
Yes. There was a silver 3 cent piece minted from 1851 until 1873, which was the smallest silver coin the U.S. ever made. Then there was also a 3 cent nickel...
3 cent coinus mintanswers