Tresillo (capital: Ꜫ, small: ꜫ; Spanish for "little three") is a letter of several colonial Mayan alphabets in the Latin script that is based on the digit 3. It was invented by a Franciscan friar, Francisco de la Parra, in the 16th century to represent the uvular ejective consonant /qʼ/ found in Mayan languages, and is known as one of the Parra letters. In cursive form, the tresillo is often written ⟨c ̑ ⟩.

As an example of use, the word for fire in the Kaqchikel language, qʼaqʼ, is written ꜫaꜫ in the Parra orthography.^[1]