I am new to Jira but my ultimate goal is to Prevent a Parent issue while the child is not closed

[Thembela Kwenene]

I want to ensure that the Story is prevented from closing if its subTask's are not in closed status or its resolution is unresolved.

I have already tried to add a condition into Sub-Task workflow but that didn't seem to resolved my issue.

[Peter Youngman]

Hi @Thembela Kwenene 
If you have Automation Rules (part of Jira Cloud or can be purchased as addon to Jira Server), you could do something like the following to change the status to "in progress" if any subtasks are not done when a Story is moved to "done". This solution can't stop someone from completing a Story, but will send it back to "in progress" when applicable. Could also send an email to the user that triggers the rule.