Samsung Galaxy J3 Pro custom recovery is now available for download. This is from the TWRP team so you get touchscreen functionality as well. TWRP is most popular form of recovery in android phones. Keep in mind that after flashing the TWRP custom recovery on your J3 Pro, your warranty will be void as this will trip the Knox counter so if you run into any problem, you would have to pay for the damages since warranty gets void after flashing J3 Pro TWRP custom recovery.
There are two ways to flash the TWRP custom recovery for J3 Pro. First is the safest method but if it does not work, try the second method.
Install Samsung Drivers and connect your device to PC. Let it install the drivers and any updates that may be required. The device drivers should install without failure.
Link to Samsung Drivers. You will also need ODIN and of course, the TWRP recovery for the J3 Pro that can be downloaded from here.
Power down your device, then when turning it on hold [ Vol down + power + home button (all at the same time) ] in order to boot the phone into Odin mode. Release it when you see the warning about entering "Download Mode". Now press volume up button to confirm. Now select AP and browse to where you have .tar file and select it
In case you want your warranty back, you can flash the stock recovery.