  Let $f:(X,B)\to Z$ be a 3-fold extremal dlt flipping contraction defined over
an algebraically closed field of characteristic $p>5$, such that the
coefficients of $\{B\}$ are in the standard set $\{1-\frac 1n|n\in \mathbb
N\}$, then the flip of $f$ exists. As a consequence, we prove the existence of
minimal models for any projective $\Q$-factorial terminal variety $X$ with
pseudo-effective canonical divisor $K_X$.
