Nani spent the season on loan with the Portuguese giants scoring 12 and providing eight assists in all competitions last season.
“I am a professional; I cannot guarantee that I will return sometimes life gives you other options.” Nani told Fanatik.
The 28-year-old winger has been closely linked with a move to Fenerbahçe after his agent Federico Pastorello entered direct talks with club sporting director Giulliani Terraneo in Istanbul last week.
The negotiations are reported to have been a success and Nani is expected to join the Yellow Canaries some time this week.
The Sun reported that Fenerbahçe have made an €8 million bid and offered Nani a four year deal worth in the region on €3.5 million per-season.
Fenerbahçe finished last season in second place and booked a place in the Champions League play-off round.
The Istanbul giants have made sweeping changes over the summer appointing Terraneo as sporting director, Vitor Pereira as manager and signing Simon Kjaer from Lille.