More RAM would help but the big problem is the GPU. GTA V recommends, as a minimum system requirement graphic card, a 1GB 9800GT which is a big step up from the discrete graphics and IGPU in the 3593. And they recommend a GTX 660 2GB.
my dell 3593  Processor Intel(R) Core(TM) i5-1035G1 CPU @ 1.00GHz, 1190 Mhz, 4 Core(s), 8 Logical Processor(s) 8gb ram but no gaming possible .  Grand Theft Auto V lag very much on low settings. I think I have wasted money on this laptop .
dell 3593 very low gaming performance.