Fiqh-us-Sunnah Volume 4, Funerals and Dhikr, Fiqh 4.062.

There is a consensus that a body may be buried during any of these three times whenever there is danger of it decomposing otherwise. If there is no such danger, its burial during these times is still permissible, according to the majority of scholars, provided that it is not done so on purpose, as reported by Ahmad, Muslim, and the compilers of Sunan on the authority of ‘Uqbah who said: “The Prophet, peace be upon him, forbade us from offering prayer or burying our dead at three times: at sunrise, until the sun rises high in the sky; at noon, when the sun is above one’s head until it declines a little; and when the sun begins to go down until it sets.” The Hanbali school holds that in light of the above hadith burial during these times is undesirable without exception.