Group III

Group III may refer to:

Chemistry
In the periodic table Group III formerly included these:
 * Group 13 elements: boron (B), aluminium (Al), gallium (Ga), indium (In), thallium (Tl).
 * Group 3 elements: scandium (Sc) and yttrium (Y) plus the lanthanide and actinide series elements.

Biology

 * The dsRNA viruses (e.g. Rotavirus) according to the Baltimore classification.
 * Group III introns, a class of introns found in mRNA genes of chloroplasts in euglenoid protists.

Other

 * Group III motor oil base stock as classified by the American Petroleum Institute