Warwickshire will continue their policy of not signing additional overseas players for the FL t20.
It means New Zealand spinner Jeetan Patel will be the Bears' only overseas player this year and will be available for the whole season.
"It's not just a question of cost. We feel there is another way to achieve success," said Warwickshire director of cricket Dougie Brown.
"We already have the players here to be competitive."
Brown continued: "The guys here have performed well in 40-over cricket in recent years and I am sure they can do the same in Twenty20."