Is it permissible to give a newspaper to someone to read it for a symbolic fee and then return it, knowing that delaying its return might affect its sale and return?

The newspaper still belongs to the publisher, not to the grocer. Rather, the grocer has been given a commission for selling it. Therefore, it is not permissible for the grocer to rent it out to someone who reads it and then returns it, because this is an unauthorized disposal of someone else's property.