When the estimated start time of your pending job is not available, you can get more details and reasons for your job not running:
By typing squeue --job <jobid >–l , you will get the following output along with the reason for your job not running.
JOBID PARTITION NAME USER STATE TIME TIME_LIMI NODES NODELIST(REASON)
110000 workq 8-tuned_ user1 PENDING 0:00 3-00:00:00 1 (AssocGrpCPUMinutesLimit)