I Am A 6 Digit Number.my Thousands Period Has A First Digit Which Is Thrice The Second Digit,the Second Digit Is Two More Than The Third Digit,all The Rest Of The Digits Are Zeros,what Number Am I?

Among single digits, those that are a multiple of three are 0, 3, 6, 9.
The number they are a multiple of is 0, 1, 2, 3.
Two less than that number gives -2, -1, 0, 1.
Solutions to your problem statement include
   620,000
   931,000