Section 3 of the Canadian Charter of Rights and Freedoms is a section that constitutionally guarantees Canadian citizens the democratic right to vote in a general federal or provincial election and the right to be eligible for membership in the House of Commons or of a provincial legislative assembly, subject to the requirements of Section 1 of the Charter. Federal judges, prisoners and those in mental institutions have gained the franchise as a result of this provision, whereas the restriction on minors voting was found to be permissible due to section 1.
Section 3 is one of the provisions in the Charter that cannot be overridden by Parliament or a legislative assembly under Section 33 of the Charter, the notwithstanding clause. Section 3's exemption from Section 33 provides extra legal protection to the right to vote and it may prevent Parliament or the provincial governments from disenfranchising any Canadian citizen for ideological or political purposes, among others.
Under the heading "Democratic Rights," the section reads:
No formal right to vote existed in Canada before the adoption of the Charter. There was no such right, for example, in the Canadian Bill of Rights. Indeed, in the case Cunningham v. Tomey Homma (1903), it was found that the government could legally deny the vote to Japanese Canadians and Chinese Canadians (although both groups would go on to achieve the franchise before section 3 came into force).
The section has generated some case law expanding the franchise. In 1988, section 3 had been used to grant suffrage to federal judges and those in mental institutions. A more controversial example is Sauvé v. Canada (2002), in which it was found that prisoners could vote. They did so in the 2004 federal election, despite public opposition from Conservative leader Stephen Harper.