@Bharvi Bhut Thanks for reaching out. If you are running the parallel branch and any branch has dependency on the other branch, then you should not run your workflow parallelly and the workflow should be sequential. There is no way to terminate your one branch based on your other branch running in parallel. Rather than you should be leveraging the Scopes and exception handling in your workflow.
Let's say as per your scenario you have branch A (left side) and branch B (right side) running parallel. So, your workflow should be sequential running the branch B and based on the condition (failed/succeeded) of your previous action you can choose whether your branch B action should be run, or not by exception handling in your workflow in the condition workflow.
If you need assistance and share more details on your requirement, then I can connect with you offline.