Nyssa marries Oliver. After Oliver's team was captured and infected with the Alpha Omega virus, she married Oliver and the "union is sealed" as said by the Priestess.

What episode does Oliver Queen Marry Nyssa?

Arrow Episode 3.22 Photos: Oliver Marries Nyssa Al Ghul.

Who is Nyssa married to?

Nyssa Al Ghul and Oliver Queen did in fact get married towards the end of Season 3 when Oliver signed on to become a member of the League of Assassins.