The 1983 D Lincoln Penny Error Shadow-3 is an uncirculated small cent coin minted in Denver. This coin features an error due to its unique strike type, making it a valuable addition to any coin collection. The error is likely caused by a malfunction in the coin minting process, resulting in the distinctive shadow-3 feature on the coin's surface. This error coin from the United States is a rare find for collectors interested in unique and distinct pieces.