Amazon had earlier said the Virginia headquarters, a multi-year investment dubbed 'HQ2', would create 25,000 jobs.
John Schoettler, Amazon's real estate chief, said in a statement on Friday the company was pushing out the date for groundbreaking of PenPlace, the second phase of the northern Virginia campus.
Met Park comprises of two 22-story office buildings with 2.1 million square feet of office space, and a two-acre public park.
Earlier this year, Amazon announced it would eliminate more than 18,000 roles, in one of its largest layoffs in history.
However, the delay in construction would not mean any elimination in jobs, Amazon said.