Europe's top clubs are closely monitoring the Santos forward, and have been doing for some time.
Neymar has been reluctant to leave his homeland despite regular reports suggesting that he is poised to complete a big-money switch.
Barcelona are among those leading the chase for his signature, with the 21-year-old having hinted that Catalunya would be his preferred destination.
The likes of Manchester City, Chelsea, Real Madrid and Paris St Germain are, however, likely to provide stiff competition to Barca in the transfer market were Neymar to make himself available.
Rosell concedes that the South American is a player of interest to his team, but insists he has no idea as to when a deal could be done, if at all.
"Barcelona are always looking for the best players," he told SIC Noticas.
"Besides home-grown players, we look for the best players from outside (Barcelona) that can improve the squad.
"As for Neymar, I don't know when he'll come. He is a Santos player until 2014.
"Neymar, like any other players that are interesting Barcelona scouts, might join the team eventually."