It is rumoured Sainz's release could be in exchange for a discount on the Renault engine bills.
"So my future depends on what they judge is best for me and where I have to go," Sainz added.
"Hopefully Toro Rosso will be better next year and closer to the top three," he said.
"I am not the only driver who wants to take a step forward. There are many others in the middle of the grid in the same situation as me, so we have to be patient for when our moment will come."
"I understand the question but I can only tell you to ask Helmut Marko," he said.
"I do not want to get too involved in the politics in F1."
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