Is it permissible to marry a Muslim girl by 'urfi or mut'ah marriage to avoid falling into sin, with the intention of completing the sharia-compliant marriage later after three years?

Temporary marriage (Nikah al-Mut'ah) is not permissible. As for 'Urfi marriage (customary marriage), it has two forms: The first is forbidden and invalid, which is marrying secretly without the consent of the guardian (wali), because the guardian's consent is a condition for the validity of the marriage contract. The second form is valid in terms of its conditions and pillars, which is with the guardian's consent but without public declaration or documentation. However, it violates the شرعي (Shari'i) command regarding the necessity of declaration, and it may lead to the loss of rights and difficulty in proving lineage. The preponderant opinion is that declaration is a condition for the validity of the marriage contract, in order to distinguish between what is lawful and what is forbidden.