Yes and No.
Liposuction will remove some fat and help you lose a little weight, but it is not significant compared to your total body weight, especially if you are thinner or have liposuction in very limited areas. You may lose up to 8-10 lbs. if you are obese and have the liposuction in multiple fat deposited areas or Total Body Lipo.
However for the most part, liposuction will not influence your total body weight by a much. It will only take away fat from selective areas of the body where you want the fat to be removed. If you do want to lose more weight, proper diet and exercise are more beneficial. Lipo is a good solution for certain areas that have fat that still remains after diet and exercise, but not as an overall weight loss solution.