March 29, 2019, marks the deadline for the UK to leave the EU, and there are two ways in which it can happen: the so called "Hard" and "Soft" Brexits.
A Hard Brexit arrangement would likely see the UK leave not only the EU but also the EU’s Single Market (of which non-EU countries like Norway and Iceland are also members) and the EU Customs Union (of which non-EU countries are also members). The UK would instead aim to secure free trade deals with the EU, ideally covering both goods and services.
There is a chance, however, that none of those deals are negotiated by the time the UK has to leave the EU, making its leave a more severe kind of Hard Brexit, called "No Deal" Brexit. If the UK ends up leaving not only the EU but also the single market, and no free trade deal is signed and put into effect in coordination with the EU on March 30th, this question will be resolved as "Yes".