It will be Stoltenberg's first visit to Turkey since the coup attempt in the country in July.
On July 15, a military coup attempt took place in Turkey. It was suppressed the following day. Over 240 people were killed and an estimated 2,000 were wounded. Ankara has accused dissident Muslim cleric Fethullah Gulen, who has lived in the US state of Pennsylvania since 1999, and his followers of playing a key role in the coup.