The Spanish youngster made the move to Goodison Park last summer on a season-long loan deal and produced a number of eye-catching performances to help Everton to a fifth-placed finish and a record Premier League points tally for the club.
Any hopes that Roberto Martinez had of keeping Deulofeu were dashed earlier this week when Barcelona announced that he would be a part of Luis Enrique's plans for next season at the Nou Camp.
But the 20-year-old remains grateful for everything Everton have done for him and believes his time at the club has helped him to develop on both a personal and professional level.
"I would like to thank Everton and all their fans for this year so special in my career," posted Deulofeu on Twitter.
"A new country, a new club, a new way of seeing, live and understand football.
"I have grown as a football player, but also as a person and that is why I would like to thank every person that has helped and accompanied me on this journey.
"I wish Everton lots of luck and success in the future. You will always be in my heart."