The 22-year-old, who joined Roma from Lyon in 2011, has been linked with a move away from Italy, but his agent has revealed the snub.
"Tottenham made a move for him, but both Roma and Pjanic thanked them for their interest and politely declined the offer," Michele Gerbino told TMW.
"This is not the time to move or consider any other offers. The lad has tied himself to this project and first of all wants to do well at Roma.
"Besides, the club locked him down. Basically, he will not be moving. Pjanic had a very positive year, adapting easily to Serie A and you can see that from how quickly he learned to speak Italian. He's very happy at Roma."
Pjanic has three years remaining on his contract.