The Hague-based tribunal is expected to deliver a verdict in the case next Friday, 15 April.
Addressing a convention of the HVIDR-a war veterans association in Zagreb, Ivic said that he had nothing against those who announced protest rallies, but that taking to the streets had never solved problems, and in this context he mentioned the case of war veteran Tihomir Purda.
Other participants in the convention, which gathered 140 delegates, also expressed their conviction in the three generals' innocence, with HVIDR-a leader Josip Djakic saying that they were optimistic because "there is no reason for punishing those who defended and liberated the territory of the Republic of Croatia".
Commenting on announced protest rallies in response to the forthcoming verdict from the ICTY, Djakic said that the street would be the last place to solve such problems.
He recalled that generals Gotovina, Marklac and Cermak had also sent messages that they did not need support from street protests.