Yes. Delays are always measured at the final destination. If you missed your connecting flight due to a delay, you are likely to arrive at your final destination with a total delay of more than three hours. Therefore you are entitled to compensation! Bear in mind that your flights must be under the same booking reference. If you purchased two separate flight tickets with two different airlines, you are responsible for getting to your connecting flight in time.
Air Passenger Law My flight was delayed with less than 3 hours but I missed my connecting flight. Can I claim compensation?