Suarez said via Instagram: "My friend I wish you the best in everything that comes!!! Also thank you for your support, for everything that I learned with you and for the unique moments that we spent together. Keep like this and never change. Love you little bro."
Neymar spent four years at Camp Nou and developed a formidable attacking partnership with fellow South Americans Suarez and Lionel Messi.
The 25-year-old is reported to have undergone a PSG medical hours after telling his team-mates that he is leaving for the French capital whilst at training on Wednesday.
The proposed transfer fee is €222million, which would shatter the record set last year when Manchester United signed Paul Pogba for €105million.
Barca have said that they would not approve the deal until Neymar's release clause has been paid in full.