I was looking for a similar solution, without success.
I think is more legal concern.
In Russia you mustn’t save data of customers on a database not in Russia, so you can use the Hubspot as form request just to send an email to the Russian partner (or do something else) and permentaly delete the customer.
The workaround I found at the moment is to create a List (i.e.: RUSSIAN CONTACTS), put the customer in this list by workflow and manualy delete every day.