Single word for "Needs Improvement"? [closed]

I guess you want a past tense verb as well here in order to describe the completed salient activity.

Reviewed might work for you, or alternatively screened if you wanted to keep the review for the final stage which results in either approval or rejection.

Deficient -- the state of containing one or more deficiencies.

If a submission is found to be deficient, then it will not be approved until those deficiencies are amended.

My suggestions are:

• Inadequate - meaning that the submission doesn't meet the requirements or it is insufficient for its purpose;
• Incomplete - meaning that the submission doesn't have all the parts necessary for its approval;
• Unsatisfactory - meaning that the submission isn't good enough (as simple as that)