Is leaking around drain insertion site something to worry about? 3 days post-op.

It is not uncommon for some leakage around the drain. The most important thing to note is whether the drain is still collecting fluid. It is not as worrisome as long as the drain is still working. If you have any further questions, I would suggest contacting your surgeon for further evaluation. 

Thanks for your question.
It is quite normal at this stage to have some fluid leaking around the drains, probably the incision has just become a bit looser.
Inform your surgeon as he might decide to remove the drain if uncomfortable for you.
Regards 
Mr Netri

Thank you for sharing your excellent question.  In general this is not an issue outside of the mess that it can create.  Most likely the drain has become clogged and instead of the excess fluid going through the tubing it is going around the tubing as a path of least resistance. I would contact your surgeon's office to see if they can help unclog the drain, or have it removed.