Staubli is a "programmer's robot" and the language is much more sophisticated than most robot programming languages. It would help if you had a C++ programmer's mindset.
It's been a while since I used the Staubli VAL3 language. I checked my old VAL3 Language Reference to confirm. I don't see that the VAL3 language supports simplistic JMP-LBL or GOTO language constructs. The language was developed to perform highly complex actions beyond simple technician-level programming. In large, complex programs JMP-LBL & GOTO commands will make the code unsupportable because it will be difficult to follow the logic and program flow for diagnostics.
In addition to the constructs provided by Psyril, you also have available the CALL-RETURN constructs. For me, that is what takes the place of JMP-LBL & GOTO constructs. My programs would have many subroutines.