Given that there is not yet any mutual recognition established between EASA and
other countries, in the domain of drones, the training or qualification obtained in
your country of residence will not be accepted in the EU. Therefore, you will have to
undergo the required training before you can fly your drone. In the meantime, other
nations may develop regulations that may be considered by the EU commission as
equivalent to those in Europe. Information on future recognition will be published on
the EU Commission website as soon as it is finalised.

(Reference Source EASA's FAQS)