Is it right to write profound regards?

The phrase "profound regards" is not commonly used in English and may sound overly formal or awkward in most contexts. It is more typical to use expressions like "warm regards," "best regards," or simply "regards" in professional correspondence. The appropriateness of using "profound regards" would depend on the specific cultural or linguistic conventions of the situation, but it is generally safer to stick with more conventional phrases to convey your sentiments effectively.