The 1999 Stuttgart Masters (known as the Eurocard Open for sponsorship reasons) was a men's tennis tournament played on indoor hard courts. It was the 4th edition of the Stuttgart Masters, and was part of the ATP Super 9 of the 1999 ATP Tour. It took place at the Schleyerhalle in Stuttgart, Germany, from 25 October through 31 October 1999. Thomas Enqvist, seeded 13th, won the singles title.
See main article: 1999 Eurocard Open – Singles. 
Thomas Enqvist defeated Richard Krajicek 6–1, 6–4, 5–7, 7–5
See main article: 1999 Eurocard Open – Doubles. Jonas Björkman / Byron Black defeated David Adams / John-Laffnie de Jager 6–7(6–8), 7–6(7–2), 6–0