Judge Vesna Adamovic in Belgrade said she questioned the Bosnian Serb general before his extradition to The Hague, and he testified that the weapons -- a hunting rifle and four pistols -- found in his home belonged to him, the Tanjug news agency reported.
The judge suspended the case against the general's wife Bosiljka, and said the government will bear the court costs.
Bosiljka Mladic did not appear in court Wednesday.
Ratko Mladic is accused of war crimes during the Balkan wars of the 1990s, including the massacre of up to 8,000 Muslim men and boys in July 1995 in Srebrenica and the prolonged siege of Sarajevo.
He was captured in May after 16 years as a fugitive.