I trimed to much off my azalea bushes and the do not bloom any more, this is the third year with out blooms what can I do???
Excessive pruning is definitely one possibility, but check this article to see if any of these other reasons might apply to you:
A soil test may be a good idea to help pinpoint a nutrition issue.
Your local County Extension Office can help you with this.
Here is a link to help you locate your closest office.
Optimize the plants care and follow a fertilizer schedule.