“The Root of All Evil” is the third mission in Crysis 3 and it contains 6 Nanosuit Upgrade Kits. They are located near the dam and CELL System-X Harvesting Facility.
Nanosuit no. 1
After falling down through the elevator shaft, move toward a large ruined dam, and you will find a turret. Nanosuit upgrade kit is located inside the building behind the turret.
Nanosuit no. 2
At the top of the dam, enter the first building (northernmost) and go down the stairs to a generator room. Nanosuit upgrade is next to the left computer terminal.
Nanosuit no. 3
After destroying the dam, proceed toward the secondary objective. In the crashed helicopter you will find a Nanosuit upgrade.
Nanosuit no. 4
Proceed down the river, until you find a yellow lifeboat (it’s approximately 240 meters from the main objective). Turn right and and look for a tunnel which leads to a cave. Inside the cave, to the right, you will find a Nanosuit kit.
Nanosuit no. 5
Behind the CELL System-X Harvesting Facility, in the upper left corner of the map, you will find a pool of water and a Nanosuit upgrade inside.
Nanosuit no. 6
The Nanosuit Upgrade Kit is inside a blue shack in the center of the CELL System-X Harvesting Facility.