iRule to allow IP address that is being blocked by ASM Geo-location policy

Try below

    when CLIENT_ACCEPTED {

    if {[IP::client_addr] == "123.456.789.101"} {   
        set disable_asm 1
        }else {
        set disable_asm 0
        }
    }

   when ASM_REQUEST_DONE {
 if {$disable_asm==1}{
     log local0. "[IP::client_addr]:[TCP::client_port]: unblocked for  for this request."
       ASM::unblock
      } 
}