No, after the hiatus in season three, the show was offically cancelled. However there was talk about a movie, but nothing has come of it.
Veronica Mars was released on 03/14/2014.
Veronica Mars grossed $3,322,127 worldwide.
Wallace Fennel in Veronica Mars is played by Percy Daggs III
Veronica Mars grossed $3,322,127 in the domestic market.
Silence of the Lamb - Veronica Mars - was created on 2005-01-04.
The Production Budget for Veronica Mars was $6,000,000.
Veronica Mars was created on 2004-09-22.
Veronica Mars was released on 03/14/2014.
The episode is titled "The *itch is Back".
Pilot - Veronica Mars - was created on 2004-09-22.
Veronica Mars grossed $3,322,127 worldwide.
Wallace Fennel in Veronica Mars is played by Percy Daggs III
Veronica Mars grossed $3,322,127 in the domestic market.
Blast from the Past - Veronica Mars - was created on 2005-10-26.
Leave It to Beaver - Veronica Mars - was created on 2005-05-10.
Silence of the Lamb - Veronica Mars - was created on 2005-01-04.
No amount of signatures can bring back a TV show once it's cancelled. Online petitions have never successfully brought back a TV show. What might bring back a TV show could be a kickstarter / crowd funding effort. It worked for Mystery Science Theater 3000 and it brought Veronica Mars back as a movie.