The Addicks experienced presented the 19- year - old an enhanced deal but he has alternatively informed the club that he will not be reporting for pre- period as he wishes to examine his alternatives somewhere else.
Poyet manufactured 23 appearances and amazed very last season as Charlton prevented relegation in the Championship.
Speaking to the club's formal web site, director Katrien Meire stated : "We are very dissatisfied that Diego has turned down our supply for him to stay with us.
"We did all we could to persuade him to continue to be with the club in which he has played from a really younger age.
" Along with our fans, I liked looking at his development past year and hoped we would continue to enjoy his progress at The Valley for a whilst for a longer time.
" Despite the fact that upset, we will continue on with our recruitment strategy for the 2014/ 15 season and do anything we can to assure the Charlton squad is as strong as attainable going into the match at Brentford on August ninth."